| ID # | Model | Description | Sale |
| 27173 | A-PA1 Solid State Stereo Phono Pre-amp | Stereo Phono preamp. If you are having trouble finding parts enter the name into search bar | $ 24
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| 27016 | Accuphase C200 | Excellent preamp - one of the best ever made!!! All special design. Ground lifted all input. RF protected/shielded. Tape 1 to 2 copy. Tone controls are switched resistor/eq circuits. High variable frequency turnover. 3 auxiliary ins, tuner in, 2 phonos. Super quality phono pre's. With gain controls. Ultra quiet. Serviced, callibrated, cleaned and excellent condition. | SOLD
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Units
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| 51652 | ADA MB-1 AC transformer B507-E | 120vAC transformer for ADA MB-1. Excellent condition. | SOLD
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Units
Available |
| 17208 | ADA MP1 | Guitar Preamp, input replaced with rugged jack and level control, Unit is Rev 5 low noise modified tube/solid st. RFI modified ground mods tube front end modified to be truly warmer and thicker overdrive and solidstate circuits have been more evenly matched. Slightly worn cosmetics, input replaced with rugged jack and level control.
On my website is a clear explanation about ADA MP1 and mods. Without a doubt the 3 tube mod is a waste of time and money and actually will make the ADA MP1 run incorrectly. This unit operates on the principal that the FETs control the tube voltage and carefully inject distortions into the cathode of the tube and also, the programming on the front panel changes plate voltages to tubes! A remarkably clever design! Obviously, the people who offer this 3 tube mod and double transformer mod don't understand this circuit or its operations technology and they are misleading concerned players.
The modification that I do actually lessens the tube gain, lowers the noise floor, and adds equalization that is better for today's vintage sound. Players want more versatility in programming usual guitar overdrive effects. The original design is way too screechy metal in its overdriven character for too many programs. My alteration allows a wider range of programming to go from the metal to warm, driven to crank, to a bluesy overdrive whereby the overdrive and equalization controls are calibrated more in the middle range of its programming numbers; i.e. Number 5 on the overdrive is now a nicely driven sound rather than a badly overdriven sound but the ADA MP1 will be still be able to be heavily overdriven on an 8 or 9 setting. These modifications were acceptable to the ADA engineer at the time. In fact, he commented that the electro acoustic sound with my parts change was similar to his thinking too, in that it allows for more flexibility for front panel adjustment for even more guitar tube preamping effects.
I've done this mod for 25 years!! No complaints yet. Please call me directly for more info.
| $ 480
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| 42090 | ADA MP1 | Tube Guitar Preamp. Version 2.00. This unit is in brand new condition in box, with manual. Mods are available, call for details. | $ 480
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| 16051 | ADA MP1 Classic | Programmable guitar pre As new in box/packing/manual, unit barely used at all, excellent cosmetic and mechanical condition. | SOLD
Similar
Units
Available |
| 40272 | ADA MP1 Tube Preamp (Rev 6) | #8+ Condition, Excellent Audio, No rack Scratches, New Front Jack, Tube EQ Mod, Battery LED Mod, Battery Supply Mod, Audio Circuit Low Noise, 5534 op amp mod, upgrade k246 FET, super low noise mod. very rugged front panel jack, jack only works as guitar input, #8 condition, excellent audio, no rack scratches | $ 540
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| 40484 | ADA MP2 | Midi Tube guitar Preamp, update noise gate/effects loop, good cosmetic condition (minor chassis scratches on top), excellent mechanical, virtually no running time (#8 overall condition), Update - noise gate, later power supply version. Stereo effects, tremelo, chorus. XLR out. | SOLD
Similar
Units
Available |
| 53403 | ADA MPI | Unit has REV6 modifications. Engineering sample. Better Overdrive/ Tube EQ ETC. SN:807518. Super quiet. Replace jacks with high quality phone jacks. #8 condition. | $ 580
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| 48866 | Adcom GFP-1A face plate | Black anodized, 3"x19", no handles. New. | $ 38
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| 27515 | Adcom GFP-750 | Minimalist version, no tone controls - volume only, balance control, processor loop, stereo/reverse/mono control, cd balanced input + RCA, balanced main outs + 2 RCA, cleaned controls, excellent conditon - with remote | SOLD
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Units
Available |
| 42302 | Adcom GTP-400 | FM/AM tuner, phono, CD, tape 1/2. Balance bass and treble controls. Unit has full service, including all cleaning and FM tuner alignment. Minor scratches on cover, some finger wear on controls, missing 1 memory button. #8 condition. | $ 200
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| 52336 | Adcom GTP-450 | stereo tuner w/remote RC-4511, AM/FM tuner w/14 presets, headphone jack, bass, treble & balance controls, inputs: CD, tuner, 2 tape, aux/video, remote controlled for all major functions except direct access tuning (presets only), very nice, condition 9+ | $ 280
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| 55213 | Adcom GTP-502 | Tuner/Preamp. CD/Tuner/Aux1/Aux2/Tape in,out/Ext Processor in,out inputs. High blend/ Countour/Bass/Treble/Balance controls. 18 Presets, AM/FM tuner. Black slimline unit with black face and digital display. Super audiophile design, extremely well built, rugged relays. Has manual and remote. Unit is virtually unused, like new condition. Condition #9+ | $ 280
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| 41990 | Advent MPR-1 | Pre-amp with 2 1/4" inputs, 2 RCA outputs (male cable end, 10" long), 18 VDC RCA power cable, can use 2 stacked 9v batteries for PS. Includes 2 dynamic mics with long 25' cables, black, slick design. 1/4" splicing block installed on pre, can be removed upon request. Please inquire for more info. | SOLD
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Units
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| 54864 | Amber Preamp Two | This Amber Preamp Two is in excellent condition and along with being serviced by AudioPro, has also received upgraded IC chips to 5532 and mute circuits. The back panel connectors have also been resoldered.
-TAPE/AUX/TUNER/PHONE/
-Subsonic/Ultrasonic/Tape Filters
-Mono/Stereo Switch/ Mute Switch
-Balance/Volume Controls
-Blackface 2 Unit Rack
-Upgraded IC chips to 5532
-Upgraded Mute Circuit
-Resoldered Back Panel Connectors | $ 240
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| 48664 | Amek System 9098 | High performance, solid state design, single channel, one rack space unit. Microphone preamp and equalizer can be used independently. All connections are balanced XLR. Excellent #9+ mint condition, includes manual, original box & packing. | SOLD
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Units
Available |
| 46544 | Ampex AM10 MX10 3-position switch | Appears to be the same part for either AM10 or MX10. Three position switch with two sets of contacts. | Contact Us |
| 48142 | Ampex phono preamp 4010097-01 | Phono preamp with RIAA equalization. Uses 8-pin connector. Excellent #9 condition. | $ 24
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| 53204 | Aphex 107 tubessence | 2 mic in. 20db pad, gain control 80Hz low cut filter, polarity, phantom. With power supply. 9+ condition. Very low use time. Cleaned controls and switches. One rack scratch. | $ 128
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| 52516 | APT | preamp knob kit, charcoal gray, 2 large, 4 small, screws, very good condition-like new, condition #9, 2 sets available | $ 30
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| 52708 | APT 201 | 100 ohm input impedance, tested good, no mods | $ 100
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| 45886 | APT 202A | Moving coil preamp. 75ohm input impedance. Super low noise top board. Serviced and fully tested, with some capacitor updates. Excellent #9 condition. | $ 240
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| 52699 | APT 202C | super low input with super low noise board, tested, may need cap update soon, condition #9 | $ 140
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| 52354 | APT Holman | pre-amp knobs, black, complete kit, 4 small knobs, 2 large knobs w/set screws, 1 set available, very good condition, like new, condition 9+ | $ 36
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| 53132 | APT Holman | Special kit of black, anodized knobs with a shiny finish. 4 small, 2 large. Unique, custom set for prototype audiophile version. Very sexy! Like new! Condition 9+ | $ 56
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| 42612 | APT Holman Moving Coil Preamp Board | 10 to 30 ohms. 10 ohm input impedence can be changed to any input impedence upon request. Please call for details. Unit tested good. | $ 120
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| 52347 | APT Holman Preamp - AP Rev3 | Full Level III AP modifications done, super spec with all caps replaced with Tantalum capacitors. Includes kit of 16 crucial transistors, op amps, FETs, and caps for ease of future servicing. Excellent cosmetic condition. | SOLD
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Units
Available |
| 50230 | APT Holman Preamp AP Rev5 | 61G333 late version model, black face rackmount with handles. With AudioPro modifications Rev5. See "Custom Mods" page for more details! Excellent cosmetics. | SOLD
Similar
Units
Available |
| 45882 | APT Moving Coil Preamp | #201/202. Moving coil preamp for Holman. Set for 100ohm input impedance, but can be changed per customer request. All caps updated, with noise check and EQ check. New old stock. | $ 240
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| 45884 | APT Moving Coil Preamp | #201/202. Moving coil preamp for Holman. Set for 100ohm input impedance, but can be changed per customer request. With low noise top board. New old stock. | $ 180
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| 44407 | APT Pre Preamp Board | 100ohm input. Excellent condition. | $ 120
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| 47016 | APT preamp back panel | Complete back panel assembly with 120vAC connector. Excellent #9 condition. | $ 55
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| 45883 | APT preamp board | For 201/202. Set for 100ohm input impedance, but can be set up per customer request. All circuits tested OK. With low noise add on board, but no capacitor updates. Fully tested and working perfectly. | $ 140
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| 47015 | APT preamp face plate | Rack mount version, green and black color. No handles included with this piece, but some may be available here. Good #7 condition with three or four long scuff marks in middle, but acceptable for someone who needs a rack face. | $ 38
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| 47014 | APT preamp face plate | New stock, black pebble micro finish. | $ 55
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| 47010 | APT preamp face plate | Standard size, black "micro pebble" finish. Excellent #9 condition. | $ 55
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| 47572 | Apt preamp face plate | Rackmount version faceplate with rack handles. Includes knobs, hardware and Allan wrench. Used, in good #7 condition due to obvious sun bleach spot and wear at input switch area. Not bad, otherwise excellent with no scratches on face. | $ 58
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| 45716 | APT preamp faceplate | Grey color with silver on edges. Good #7 condition with small dent on bottom and minor wear on edges. | $ 24
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| 43344 | APT rack face | Anodized black, no handles. New stock. | $ 68
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| 52463 | APT Stereo | Audio Pro modified Rev 3, EQ, caps, audio headphone, power supply, new relay, condition 9 | $ 440
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| 54241 | ART Digital MPA II | Two Channel Tube Mic Preamp with digital outs. XLR I/O, 1/4 inch output. AES/EBU, SPDIF, ADAT, Optical outputs. Word Clock in/thru. Sample rate control. MS Matrix. Variable input impedence. Minor rack rash. | $ 360
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| 54242 | ART Digital MPA II | Two Channel Tube Mic Preamp with digital outs. XLR I/O, 1/4 inch output. AES/EBU, SPDIF, ADAT, Optical outputs. Word Clock in/thru. Sample rate control. MS Matrix. Variable input impedence. Minor rack rash. | $ 360
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| 26387 | ART DJ Pre | Outboard Phono preamp box, 1 time demo - perfect condition, has 12v AC adapter, ruggedized rca in/outs | SOLD
Similar
Units
Available |
| 38371 | ART DJ Pre II | Phono Preamp with 12v AC adapter, rca in/outs, with cartridge loading and low filter and gain control, NEW. | $ 50
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| 38372 | ART DJ Pre II | Phono Preamp with 12v AC adapter, rca in/outs, with cartridge loading and low filter and gain control, NEW. | $ 50
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| 39074 | ART DJ Pre II | Outboard Phono preamp box. | $ 60
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| 40010 | ART DJ Pre II | Phono Preamp with 12v AC adapter, rca in/outs, with cartridge loading and low filter and gain control, NEW. | $ 60
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| 49137 | ART DJPre II | New in box phono preamp by ART. | SOLD
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Units
Available |
| 34294 | ART DPS | Stereo tube preamp with adjustable tube voicing, 48v phantom, digital outs, Supermodified (PS, tube, shielding/ground, noise spec, RF noise) - call for details
HERE IS A LETTER TO ONE OF OUR CUSTOMERS CONCERNING DIGITAL CLOCK MOD "FADS" AND OUR ART DPS MOD:
Dear customer,
First of all, the clocks, stability of the clocks, or any clocks, are not the real problem in digital. I have personally never seen a problem with them, and most BSEE agree with me. Modifications to any DAC are suspicious. I am aware of this current modification “fad” but I don’t spin it. The people who claim such improvements are suspect. More problems exist concerning super sonic digital clock noise spray into the audio circuitry, and correct grounding issues, which tend to be the real culprit. In fact, this is why dither noise is added in the DAC circuits to linearize the converter so it will not see incoherent noise bursts on the digital ladder. (bit converter) Whether it is a $20 circuit or $2,000 circuit, better grounding and shielding of the DAC, clock, etc will usually solve the problem of super sonic noise ingress into the audio circuitry. This labor typically costs around $66. In the future, these supposed high cost, esoteric mods will prove to have minimal value. If you want more information, feel free to call and I will explain more about my ART modification. Also feel free to read my website, www.audioproz.com which will also explain about the ART mod and some important theory of audible effects of clever tube enhancement.
| $ 400
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| 33159 | ART Dual MP Model 254 | Two channel tube mic preamp - basic tube mic preamp, 48v phantom, in/out level led meter, 1 rackspace | $ 240
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| 39808 | ART MPA gold mic pre | sn# mo70104106 audio pro midified matched spec channels, match spec tubes, RFI ground mod, and transformer position mod front end noise mod, gain mod. | $ 380
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| 39767 | ART MPA gold mic pre | sw: MO70103917. Sale | $ 300
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| 54073 | Art Pro Channel | Mic preamp, parametric EQ, compressor. #10, new condition | $ 228
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| 46218 | Art Pro Channel | New stock, Super low noise, QC by AudioPro. Microphone preamp, compressor, and EQ. | $ 330
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| 48534 | ART Pro Channel | Tube mic preamp/compressor/equalizer. Super spec QC. Highly recommended machine! New stock. | $ 240
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| 48537 | ART Pro Channel | Tube mic preamp/compressor/equalizer. Super spec QC. Highly recommended machine! New stock. | $ 240
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| 48536 | ART Pro Channel | Highly recommended product! Tube mic preamp, compressor, and equalizer. New in box. | $ 200
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| 43860 | ART Pro Channel | ART pro channel. Tube microphone preamp. Six stage tube design for preamp, compression, and equalization. New stock fully QC'ed. With true tube "Gain Cell" compressor. Super spec unit. | $ 280
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| 54689 | Art Pro Channel | Modified vactrol variable transformer, and tube bias mod. Professional tube microphone pre-amplifier. Tube/optical compressor. +48V phantom power supply. With true "tube gain cell" compressor. B stock. | $ 480
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| 53765 | ART Pro Channel Tube Mic Preamp | Tube Mic Pre Compressor/EQ. SN: S100826255. QC Test, Ok. Condition; New. | $ 240
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| 50897 | ART Pro MPA | Two channel microphone preamp with analog VU meters. 1/4" and XLR in/out, switchable gain, phase and Phantom, HPF adjustable 65Hz to 7Hz. With "Pultec" style cap and coil dynamic equalizer circuit. Excellent condition. | $ 900
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| 40839 | ART Pro MPA (Engineering Sample) | Stereo Mic Tube Preamp, Super Fi modified for audiophile tube preamp -(higher gain/lower noise, tube, eq, pad, RF PS, mic front preamp mods). All in one Microphone preamp, Harmonic Enhancement controller, tube compressor design. The ART PRO MPA when fully modified is $990. It is truly still unique for some of the clever adjustment capabilities. The most obvious is the ability to adjust the level and phase of a very euphonic second harmonic distortion which is then gain rided. The preamp can sound thick, punchy, dense, edgy, silky, warm, strident, etc. It’s not just equalization… it is an alteration and enhancement of the original audio signal....read more about it here. | Not For Sale |
| 31548 | ART Pro MPA (Engineering Unit) | Stereo Mic Tube Preamp, Meters Excellent level control, variable low frequency roll off, tube character is very subtle but audible **Super Modified - Engineering Unit** ask for details | Not For Sale |
| 34295 | ART Pro MPA (Modified) | Stereo Mic Tube Preamp, Super Fi modified for audiophile tube preamp -(higher gain/lower noise, tube, eq, pad, RF PS, mic front preamp mods). All in one Microphone preamp, Harmonic Enhancement controller, tube compressor design. The ART PRO MPA when fully modified is $990. It is truly still unique for some of the clever adjustment capabilities. The most obvious is the ability to adjust the level and phase of a very euphonic second harmonic distortion which is then gain rided. The preamp can sound thick, punchy, dense, edgy, silky, warm, strident, etc. It’s not just equalization… it is an alteration and enhancement of the original audio signal. ....read more about it here. | Not For Sale |
| 49288 | ART Pro MPAII | Two channel tube mic preamplifier. New. Highly recommended product! | $ 288
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| 50183 | ART Project Series | USB Phono Plus. "Sound Saver Software" USB Cable/ No DC supply. 9v 150 MA can be available. AC/DC | $ 88
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| 50187 | Art Project Series | USB Phono Plus. 'sound saver software' USB Cable/ No DC Supply. (9v 10 MA can be available) AC/DC | $ 88
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| 53580 | ART TPS II | Dual Channel, Tube mic Pre. Variable Impedance, variable voicing, analog output meter, output protection. | $ 188
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| 53579 | ART TPS II | Dual channel, Tube Mic Pre, Variable Impedance, Variable voicing, Analog output meter, Output protection. | $ 188
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| 53576 | ART TPS II | Dual channel, tube mic pre, variable impedance, variable voicing, analog output meter, output protection. QC Tested. Original. No mods. | $ 188
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| 41413 | ART TPS II | Tube mic preamp TPS II.
REV 7 Modified. Front panel control pot added for control of the Harmonic Distortion of the 12AX7 tube, Gain pad switch equalization improved for better low end response, power switch and transformer insulated from the audio with copper shielding, unbalanced inputs now accept +14 dbm. | Not For Sale |
| 45936 | ART TPS II | AP Modified Rev4 version, new stock. Mic preamp with advanced tube harmonic enhancement. Also to be used as line level processor for adding calibrated tube character. Extra control added for precise tube enhancement. Meter mod, compression mod, transformer shield, and noise floor mod. This is a professional studio quality device! | $ 380
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| 47739 | ART TPS II | New. Highly recommended product! | $ 200
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| 47736 | ART TPS II | New stock item with Rev4 modifications by AP: +14dBm input capability, in/out phase harmonic control, gain/headroom mod, compressor mod, and added RF shielding. | SOLD
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Units
Available |
| 41417 | ART TPS II Modified Rev 6 | New in box, modified tube harmonic enhancement, level match control, EQ mod, Metering Mod, Compress Mod, Transformer shield, Tube Gain mod
To learn more about the modifications on this unit, see the articles section of the website. | SOLD
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Units
Available |
| 41599 | ART Tube Fire | 8 channel tube microphone firewire preamp and interface, world clock in/thru, Fireiwre in/out, 8/8 Firewire interface (8 analog ins and outs), TRS 1/4" XLR combo input jacks, 1/4" TRS outputs, flexible monitoring, clip indicator for each channel, 48V of phantom power, up to 96K sampling rate | SOLD
Similar
Units
Available |
| 46106 | ART Tube MP Project Series USB | Professional mic and instrument tube preamplifier with USB connectivity. New stock. | $ 110
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| 40796 | ART Tube Pac | Combination mic/line preamp and optical tube compressor. fat and warm gain settings, tube warmth and gain reduction metering. Phase reversal, Phantom power,xlr and 1/4 inch i/o. | $ 120
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| 41325 | ART Tube Pac | XLR 1/4 in ins and out w/ phantom power - 1/2 rack/desktop design - bench tested | $ 130
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| 47735 | ART Tube PAC | New stock, highly recommended item! | $ 120
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| 47734 | ART Tube PAC | New stock, highly recommended item! | $ 120
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| 49524 | ART Tube PAC | New in box tube microphone preamp with XLR and 1/4" ins/outs. | $ 130
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| 49525 | ART Tube PAC | New in box tube microphone preamp with XLR and 1/4" ins/outs and phantom power. | $ 130
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| 54041 | ART Tubefire 8 | 8 Channel Tube preamp with a firewire connection, pad/low cut filter per channel, and 8 mic/line balanced inputs. The special feature of this unit is that it has 8 tubes which add warmth and character to each available mic input. It also features 8 balanced outputs with word clock i/o and 48v phantom power for all 8 channels. Instruments can be connected via the two instrument inputs. This unit is in near perfect condition and was a demo unit with very low use time. Tubes are guaranteed to be in perfect condition. AudioProz has serviced and maintained this unit to ensure you will not be disappointed with your purchase. | $ 288
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| 48085 | ART USB Dual Pre | New in box. | $ 88
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| 52232 | ART USB Dual Pre PS | Project Series two channel microphone preamp and USB audio computer interface. Fully balanced XLR and 1/4" TRS inputs. New in box. | $ 80
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| 45488 | ART USB Phono Plus | New stock. | $ 88
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| 50998 | ART USB Phono Plus v2 | with headphone monitor and level control. New in box with Audacity recording software and user manual. | $ 76
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| 51396 | Ashly SC-44 "Keyboard Input Processor" | 4-channel mixer with 3-band sweepable equalizer per channel, PA send, and separate monitor send. 3-rack space unit. Excellent condition, cleaned, serviced, tested. | $ 160
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| 52812 | Audio Access PX-600 | preamp control unit only, requires special cable/connector, tested ok, condition #9 | $ 200
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| 42625 | Audio Alchemy VAC-in-the-Box | Phono preamplifier, can handle +14 dbm output, audiophile FET input, OpAmp output, external power supply, #9 condition | $ 200
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| 48449 | Audio Research MJ413 | Special, high voltage regulator transistor. New old stock. | $ 22
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| 41066 | Audio Source Pre One A | | $ 220
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| 32899 | Avalon VT-737SP | New, Single channel esoteric tube processor, compressor,mic preamp, semi-parametric EQ. | SOLD
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Units
Available |
| 42119 | BBE 381 | 2 channels (clean and distorted), BBE Process control, unit is fully cleaned and serviced, #9 condition | $ 160
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| 45016 | Behringer Bass V-Amp | New stock. | $ 108
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| 39355 | Behringer MIC200 Tube Ultra Gain | Tube mic pre with 16 voicings. | $ 55
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| 53915 | Behringer Microphono PP400 | Stereo phono preamp. New. | $ 38
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| 53917 | Behringer Microphono PP400 | Stereo phono preamp. New. | $ 38
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| 53918 | Behringer Microphono PP400 | Stereo phono preamp. New. | $ 38
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| 53916 | Behringer Microphono PP400 | Stereo phono preamp. New. | $ 38
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| 53914 | Behringer Microphono PP400 | Stereo phono preamp. New. | $ 38
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| 34963 | Behringer Shark DSP110 | Digital 24-Bit Multifunction Signal Processor. Mic/Line preamp, Feedback destroyer, delay line for speaker time-alignment, compressor, 48 V phantom power, 24-bit A/D and D/A converters. Very compact (5 units mount in just over 1 rack space). Great "swiss army knife" live application tool. New unit, in box. | $ 90
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| 34960 | Behringer Shark DSP110 | Digital 24-Bit Multifunction Signal Processor. Mic/Line preamp, Feedback destroyer, delay line for speaker time-alignment, compressor, 48 V phantom power, 24-bit A/D and D/A converters. Very compact (5 units mount in just over 1 rack space). Great "Swiss army knife" live application tool. New unit, in box. | $ 90
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| 34961 | Behringer Shark DSP110 | Digital 24-Bit Multifunction Signal Processor. Mic/Line preamp, Feedback destroyer, delay line for speaker time-alignment, compressor, 48 V phantom power, 24-bit A/D and D/A converters. Very compact (5 units mount in just over 1 rack space). Great "Swiss army knife" live application tool. New unit, in box. | $ 90
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| 34857 | Behringer Ultragain Pro MIC2200 | 2-Channel Tube Microphone Preamplifier/Line Driver/DI Box. "Soft Mute" 48v phantom, XLR & 1/4" ins/outs. Integrated parametric EQ. 12 segment LED meter. New in box. Great preamp at incredible price. | $ 98
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| 35965 | Behringer Ultragain Pro MIC2200 | 2-Channel Tube Microphone Preamplifier/Line Driver/DI Box. "Soft Mute" 48v phantom, XLR & 1/4" ins/outs. Integrated parametric EQ. 12 segment LED meter. New in box. Great preamp at incredible price. | $ 98
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| 37541 | Behringer Ultragain Pro-8 Digital ADA8000 | 8-Channel A/D & D/A Converter with 8 Mic Preamplifiers and ADAT Interface. 44.1 or 48 kHz with 24-bit resolution. Phantom power. Optical I/O. Single space rack mount. | SOLD
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Units
Available |
| 53921 | Behringer V-Tone Guitar GDI21 | Guitar amp modeler/direct recording preamp/DI box. New. | $ 48
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| 22546 | Bellari 220 Dual Mic Pre | Dual Mic preamp - Full mods (RFI, Front End Pad, Impedance/Transformer-Higher output level/lower noise, PS, Hi Filter, High Freq slight harmonic distortion, plate saturation, chassis flownoise) - super quiet | SOLD
Similar
Units
Available |
| 30131 | Bellari MP110 | Single channel tube mic preamp, 1/2 rack space, XLR and 1/4" in/out | SOLD
Similar
Units
Available |
| 30179 | Bellari RP520 | Tube Mic Pre, Gold Face, VU meters | $ 430
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| 50898 | Bellari RP533 | Studio tube compressor/limiter preamp. AudioPro modifications to optimize tube gain and noise, power supply updates, phase switch pad and hi gain switch added on front panel. Excellent condition. | $ 520
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| 24764 | Carver 4000T | Mint brused gray silver, black controls, A-Z of controls, inputs, clenaed and serviced here, MINT | SOLD
Similar
Units
Available |
| 52481 | Carver C-1 | stereo w/sonic holography, inputs: 2 aux, tuner, 2 phono (1 for MM & MC), stereo/mono switch, speakers on/off, 2 tape/monitor loops, dubbing 1 to 2 & 2 to 1, loudness, tone on/off, 2khz & 8khz turnover switch, separate bass & treble for each channel, power switch is not operational. switch jumpered to lessen noise in pre amp. | $ 180
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| 54123 | Carver CT-17 | Unit has had major resolder and ruggedizing ground connects. Full functional Quasi 4 channel/ ambient, delay, dolby, etc. Video Coaxl/ 2 Aux in, tuner, CD/ phone, can record + monitor simultaneous, 20 station preset. #9 condition. | $ 240
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| 53047 | Creek OBH-8SE | phone preamp, we've installed MU metal shielding and changed the P.S. grounds to make it super low noise, FET front end, condition #9 | $ 160
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| 26275 | Crown Straight Line 2 | Mint Condition, 1-rack space preamp, audiophile quality preamp with highest quality op amp, caps, connector controls, and circuit board. 2 aux ins, 2 tape inputs/dubbing, and processor loop, monitor switch L/R mono reverse switchable/defeat tone controls, Nice Style.
Although these Crowns are excellent preamps they’re not significantly different than an APT (which actually has a better phono pre) or an Adcom. Those two are both 2 rackspaces though.
| SOLD
Similar
Units
Available |
| 43676 | DBX 386 | Dual vacuum tube preamplifier. 2 channels, each with 1/4" and XLR ins/outs. Professionally cleaned and serviced. Some minor scratches on top cover. | $ 275
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| 42402 | dbx Mini-Pre | Mint condition, single channel design with 12AX7 vacuum tube, -20db pad, phase switch, and 48v phantom supply. Peak and power LEDs. 60dB gain and -infinity to +10dB of output level. XLR microphone input, 1/4" TS line input, balanced 1/4" TRS and XLR outputs Table top design, very portable. | $ 80
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| 42401 | dbx Mini-Pre | Mint condition, single channel design with 12AX7 vacuum tube, -20db pad, phase switch, and 48v phantom supply. Peak and power LEDs. 60dB gain and -infinity to +10dB of output level. XLR microphone input, 1/4" TS line input, balanced 1/4" TRS and XLR outputs Table top design, very portable. | $ 70
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| 44032 | Demeter VTMP-2A | Tube mic preamp modified by AudioPro. Modified gain and second order harmonic distortion for in-phase/out-of-phase harmonic. All variable gain drive for mic preamp and variable tube harmonic enhancement. | $ 980
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| 42727 | Dynaco PAT - 4A | SN: 18123823. Stereo Pre-amp with "special", tape head, phono, tape, tuner, spare inputs. Volume, balance, stack stereo bass, stacked stereo treble, and selectable "HI Filter" (low pass filters at 15, 10, or 7k) all on nice metal style knobs. Front in/out 1/4" inputs, with tape monitor, loudness, "lo" filter, and stereo/mono A/B all on rocker style switches. Illuminated rocker power switch. Minor cleaning needed for back panel jacks. #9 condition, low use in excellent condition. | $ 148
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| 27128 | Dynaco Pat 5 | Excellent Condition. 3 Tape ins, spare EPL external processor loop, 2 speaker switching capable. Many modifications and updates, most capacitors in audio circuits and upgrade some power supply capacitor clean all controls switch. | $ 280
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| 6637 | Fisher #50 C-4 | Tube mono, w/manual - 78 equalizer. If you are having trouble finding parts enter the name into search bar | SOLD
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| 27660 | Fisher 50-PR | Phono preamplifier/equalizer, Mint Condition Cosmetically, Mono Vintage device in brown bakalite box with brass face plate, for 78 equalization, unit has powersupply upgrades, cleaned and serviced. | $ 265
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| 50415 | Focusrite ISA428 Pre Pack | 4-channel mic preamp, all channels checked for noise, all controls tested, mint condition, like new with box and packing. | SOLD
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| 40829 | Furman MM-8A | Excellent quality low noise 4 mic pre mix to 2 channel (4x2 mixer). 48V ground lift, some minor updates. 5534 op amp design, 1 effects send. | SOLD
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| 43346 | Hafler Rack Face | Early version black face plate. With 10 square push buttons. Excellent #9 condition. | $ 30
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| 42182 | Kenwood K206 | video/audio in, phono, tuner, aux, 2 tape in/out, CD, fully serviced, ruggedized, and cleaned, this unit is the match to the KM106 | $ 220
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| 38917 | Kenwood KC209 | Control Preamp w/remote, 7 band program band EQ, nice FIP readout, cleaned and tested OK | SOLD
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| 24127 | Luxman 5C50 Pre-amp | Absolute top quality Class-A circuitry! Open discrete op-amp module upgrades. Low-use time, excellent condition. Part of matching 3-piece set. Also included are Luxman 5M521 Amplifier (see # 24128 in amplifiers), and Luxman 5T50 Tuner (see #24126 in receivers). We would like to keep this beautiful system together, so the PRICE IS FOR THE WHOLE SYSTEM not just the preamp.**SPECIAL WHOLE SYSTEM SALE** | SOLD
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| 24017 | Luxman C-12 | Slim line aluminum, Linear phase EQ! Very high-quality parts & controls, exc phono pre. (1 module pulled - - no phono!) | Contact Us |
| 45156 | Marantz AW115-1061-4 | Circuit board with switch. | $ 24
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| 52891 | MCM 40-630 | Solid state stereo. Phono pre-amplifier. RCA in/out. 9 condition. | $ 18
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| 26438 | Model PE2 Line Amp | Preamp, 600 ohm in, 8 ohm out, input/output volume control, small add on line box converter for installation/adapting audio signal - call for details | Contact Us |
| 43200 | NAD 1130 Stereo Preamplifier | Phono/Aux/CD/Tape1/Tape2/Tuner in. 2 outputs, 2 band bass/treble tone control. Capacitance load switch. Does moving cartridge or moving magnet. #8+ condition with some minor scratches on top cover. All controls and switches cleaned. Fully tested. No noise or modulation. | SOLD
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| 50224 | NAD 1155 | Stereo preamp with headphones out, phono/MM/MC in, aux/tape/CD in, monitor listen switch. Excellent basic audiophile preamp. Professionally cleaned, serviced, tested. | SOLD
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| 26539 | NAD Series 20 1020 | Stereo preamp, Good phono preamp, all controls and switches cleaned | SOLD
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| 55112 | NEC AVD-700 | Disital Surround Processor/Preamp. CD/Tuner/Aux 1/Aux 2/Tape/Video 1/Video 2/Video 3/Video 4/ TV/SS inputs. Adjustable millisecond delay/ channel inversion/ adjustable echo. Dolby surround/Hall/Matrix/Creation modes. Adjustable left/right input level. Nice line level remote preamp, excellent surround processor. Blackface unit with digital display. Ruggedized grounds, updated power supply. Unit has remote. Condition #8+ | $ 200
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| 44157 | Newmann PV76 | Up to 76dB gain in 6dB increments, selectable high pass filter at 40, 80 and 140Hz, XLR mic level inputs and XLR +4 dB outputs. | Contact Us |
| 25159 | Nikko Beta 30 | Stereo preamp with box, packing, and manual, 1 1/4 rack space (non standard) power supply mods, 2 simultaneous ins/outs, sound proc loop, phono, tape monitor, bass treble | SOLD
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| 14480 | Nikko Beta 50 | Preamp - Stereo, modified (PS, headphone, regulator stage, tone control for better signal to noise), unit in excellent condition | SOLD
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| 17049 | Nikko Beta 50 II | Stereo Preamp, On front panel 2 input mixing/monitor, 3 external processor loops, resoldered, modified, cleaned, new power supply | SOLD
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| 52556 | Noble | precision pots, detented control, #279Y10Kx2, 10k ohms X 2, 6 legs, 5/16" shaft length, 10 available, new, condition #9 | $ 28
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| 52567 | Noble | precision pots, #279Y10Kx2 8323, 10k ohms X 2, 8 legs, 5/16" shaft length, 6 available, new, condition #9 | $ 28
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| 17004 | Ortofon MCA76 | moving coil preamp | SOLD
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| 27851 | Parasound C/PT-1000R | Tuner Preamplifier, Very good tuner, Digital Display, Excellent condition, PS and ground mods to eliminate hum, modified headphone out to be super quiet | $ 280
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| 54863 | Parasound P/FET 900II | The Parasound P/FET 900II is a Class A circuit preamp with a full featured set of ins and outs, slim black faced design, and this particular unit has our improved grounding mod which helps reduce any unwanted hum in the signal path. The unit is in excellent condition and like all our items, it has been cleaned and inspected by Audio Proz to ensure you are receiving the highest quality products.
-Inputs: Tape 1/Tape 2/Video/CD/Tuner/Phono
-Record Out on Tape 1/2
-Bass/Treble/Balance/Loudness/Volume Controls
-Tone Defeat/ Mono Switches
-No Headphone
-Black
-AudioProz grounding Modification
-Condition #9 | SOLD
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| 54866 | Parasound P/SP-1000 | This Parasound P/SP-1000 has low use and has been calibrated and serviced by Audiopro to ensure the unit is in excellent working condition.
-AV Processor/Pre-Amp
-LD/Video 1/Video 2/Tape/Line Inputs
-Dolby Pro Logic
-Reverbs: Stadium, Hall, Club
-Preamp Direct Option, Bass EQ Switch
- 15/20/30ms Delay
-Subwoofer/Rear/Center Levels
-Overload and Front Balance Knobs
-2 Space Rack Mount | $ 180
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| 26874 | Phase Linear 2000 | Stereo Console, 3 AC outputs, 1 switched and 2 unswitched, Inputs - tape 1, tape 2, tuner, aux, and phono, Outputs - Main L,R and LR + RR, tape 2, tape 1, Seperate tone controls, Tone controls (Rotary) - Left treble and bass, Right treble and bass, balance, volume, ambience, and selector. Tone control (switches) stereo/mono, ambience, loudness, fully cleaned and refurbished, cosmetically good | SOLD
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| 22762 | Phase Linear 3500 | Preamp - 3 band sweepable parametric EQ, selectable EQ bandwidth, tone bypass, 2 tape monitors, 1 aux input. Low filter, mute and loudness switches, cleaned and calibrated, Modified - Call for details | SOLD
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| 53470 | Phase Linear 4000 Stereo Preamp | Phono 1/2, aux, tape 1/2 ins. Joystick balance control. L/R bass and treble controls. Switches for turnover frequencies. All caps replaced with higher-quality parts, board connections ruggedized. Modified low noise floor, modified better detent volume control. | $ 448
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| 47386 | Pioneer SPEC-1 | Full function stereo pramplifier, silver face, 120/240v switchable, fully cleaned and tested, truly excellent cosmetic condition. | $ 580
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| 40931 | Presonus Blue Tube Mic Pre | 2 channel tube preamp. XLR, 1/4 inch in/out. New in Box. | $ 200
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| 47694 | Presonus Eureka | Mic preamp/compressor/parametric EQ. Demo unit, engineering sample. Excellent #9 condition with some minor scratches on top and bottom of case. | Contact Us |
| 45445 | Pyramid SEA-2500 x | Stereo preamp with Tuner, Aux, CD, Mic, and Phono inputs. Tape, mono, low filter, and muting buttons. Bass, mid, treble, and volume controls. Super tweek modification to EQ and find adjustment of balance. Professionally cleaned and serviced, all controls checked and OK. | $ 185
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| 45446 | Pyramid SEA-2500x | Tuner, Aux, CD, Phono, Mic inputs. Bass, Mid, and Treble EQ controls. Made minor modifications to make perfect level and EQ match between channels. New stock, QC'ed. | $ 185
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| 928053 | Re: International Shipping | We ship internationally often and have yet to encounter a problem or complaint. We are very careful to test the equipment before it’s packed and then to double box the machine with added protection when needed for front panels, etc. We are not amateurs or an ebay store; we know these machines very well and know what it takes to get them to you safely. We use USPS priority internationally which seems to be the cheapest. If you prefer another carrier (you should know who delivers to your area reliably) please let us know. Also please be aware of any tariffs that you may be responsible for upon pick up on your end. International shipping may be expensive but we will make sure it is not a headache on top of the cost. | FYI |
| 27652 | Realistic 42-2930 | Phono Preamp - Solid State Stereo Pre-Amplifier, Small wall or cabinet mount box. Single Stere input/output device powered by AC line cord. | SOLD
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| 42483 | Realistic Stereo Pre-Amplifier 42-2101 | RCA out, mic 1/4" stereo inputs, phono RCA in. | SOLD
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| 18815 | Rolls MP13 Mini Mic Preamp | Mini Mic Preamp - Mic preamp with 30v phantom power | $ 90
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| 19512 | Rolls MP13 Mini Mic Preamp | Mini Mic Preamp - Mic preamp with 30v phantom power | $ 90
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| 19289 | Rolls PB24 | Mic Preamp mono, phantom 12/48v, super compact, can run on battery or with power supply | $ 78
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| 41699 | Rotel RTC-940 AX | Tons of control, 8+ FM digital memory. Aux, CD, Tape 1/2 inputs. No phono inputs. Slim-line, black color (Adcom look), with remote. Excellent, #9 condition with box. | $ 300
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| 54653 | SAE | AC power switch, with white button. 2 sets of contacts, salvaged, #9 | $ 12
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| 50556 | SAE 2900 | Stereo preamp with parametric EQ (2-bands), 2 phono inputs 2 tape deck ins/outs, tuner and AUX in, mono/stereo/reverse, 2 headphones out. Excellent #9 condition (very light scuffs on edge) cleaned and lubed all controls and switches, re-soldered grounds and connectors, full function test QC. Headphone load output circuits and full unit can be updated for improved ground and phono noise upon request. | $ 240
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| 42405 | SAE 2900 Audio Preamp | 2 stereo sweep parametric band control. 2 tape dubbing, 2 phono input, excellent phono pre IC updated with lower noise 4747 op-amp. Tuner in and aux in. SAE "level" control sliders, all correct original fader in excellent condition. Face plate has very minor scratch at rack holes. "Ruggedized" circuit board connectors and power supply. #8 condition. | $ 220
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| 43246 | SAE Mark 1B | Stereo pre and equalizer. Inputs: Phono 1 & 2, Aux 1 & 2, tuner. 3 tape monitor loops, 2 speaker sets, balance and gain controls, 7 band equalizer. #8.5 condition with minor scratches on top cover. Power switch glued in place. | $ 480
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| 18809 | SAE MK1B | Super-quality hand wired boards, low noise, hi-accuracy controls, 7 bnd EQ, 8 AC sockets, 3-space rack mt - speaker add on cable for interfacing amp | SOLD
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| 54341 | SAE model 1800, 2900, and others | Power transformers. Creates +/-15 volts. salvaged. | $ 18
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| 9224 | SAE P102 | Stereo preamp, programmable tone settings, 2 rack space, re-enforced all ground connections on RCA jacks and cleaned and serviced, excellent condition | SOLD
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| 21839 | Sansui RA-990 | Stereo Preamp, Stereo mic mixer adds reverb to mix, Stereo line ins, 2 tape in/out, Stereo out, 1/4" mic/guitar ins, each channel has level and pan controls, | $ 140
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| 43886 | Shure M64 | Shure M64 stereo preamp. 2 channels, RCA ins/outs, equalization switch for phono, flat, or tape. | SOLD
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| 46055 | Stanton 310 | Phono Stereo preamp, with dip switches for cartridge impedance matching. Uses RCA in and professional screw terminals out. Unit can operate at AC 120 or 230 volt. Excellent #9 condition. | SOLD
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| 21849 | Sumo 0620 Stereo Pre-amp | Class A circuitry design pre-amp, very clean sounding unit, very good condition black one-sapce rack mount. | $ 300
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| 9763 | Sumo Athena Preamp | Total discreet class A circuits throughout, shielded transformer, high quality level control and switch $800 for complete Sumo System, Polaris amp, Athena Preamp, and Aurora Tuner | SOLD
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| 22246 | Tascam MX-80 Mic Mixer | 8 channel mic preamp, add on 48v power, extremely high gain low noise full bandwidth mic pre, 2 space rack unit, excellent conditon | $ 360
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| 24945 | Tascam MX-80 Mic Mixer | 8 channel mic preamp, add on 48v power, extremely high gain low noise full bandwidth mic pre, 2 space rack unit, excellent conditon. Rental Unit. | $ 360
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| 38159 | Technics SU-9070 Preamp | Stereo Preamp, complete, excellent mechanical and cosmetic condition. Ruggedized, updated, cleaned and calibrated. Nice Unit. | SOLD
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| 27655 | Technics SU-9200 | Stereo Preamp, Excellent condition, very good cosmetic, Stereo Control Center, Inputs-(Tuner, 2 aux, 2 phono, 2 tape monitor loops) gain control for phono 2 / 20db Mute Switch, phono impedance controls, Toned dereat, L/R bass and treble controls, bass and treble filters, stereo, reverse L+R, L, R, Mode switch, sounds like/design similar to MAC preamps (individual resistor/circuits for tone control) highest quality parts used. | SOLD
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Units
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| 42049 | Telefunken v72 | 12 pin (blade type) multi-pin connector, modular type design, locking latch on front panel, all metal chasis, untested but unit is totally intact and all internal cicuits look good | SOLD
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| 43093 | The Apt/Holman Preamp Owners Manual | Original Owners manual #8 condition, minor scratches on front cover. With Schematic included. | $ 10
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| 18023 | TL Audio Dual Pre | Dual Mic Preamp | SOLD
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| 41406 | Tube Mic Preamp TPS II - Rev 6 Modified | New in box, modified tube harmonic enhancement, level match control, EQ mod, Metering Mod, Compress Mod, Transformer shield, Tube Gain mod
To learn more about the modifications on this unit, see the articles section of the website. | SOLD
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| 43884 | Tube PAC | New stock! QC'ed by AudioPro | SOLD
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| 45343 | Tubessence Aphex 107 face plate | New old stock, never used. For two channel thermionic microphone preamplifier. White lettering with gray background and purple border. Perfect condition! | $ 18
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| 25276 | Yamaha C-60 | Modern, semi-audiophile unit, 4-bd eq, black modern unit, tuner, phono, aux, tape, phone jack, mute, eq bypas etc. | SOLD
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| 48885 | Yamaha C-70 parts | Nonfunctional machine good for parts. Face plate in excellent condition (one very tiny edge nick), internal ladder ribbon cables for function switches, volume control, etc. Many specialized parts available. | Contact Us |
Preamps