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Preamps
( 216 Preamps sorted by Price High to Low.)
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APT Holman Preamp - Audio Pro Level 3 mod/update
# 73656
(2) Phono, (1) Tuner, (2) Aux, Tape 1 in/out, Tape 2 in/out, External processor in/out, Main out 1, Main out 2 - Audio Pro Level 3 mod/update - Audio & power supply caps upgraded - Relay upgraded RFI mods, Ground mods - Fully tested, cleaned, serviced. Fully functional unit with minimal signs of use/wear - SN: A4760 - Very clean unit, face only has minor wear. Top cover has slight discoloration. All controls & connectors are clean & functional - Condition: 9
$ 988
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Apt Holman Preamp
# 73652
Standard grey faceplate, light grey knobs. Top quality preamp with Level III mods & updates by Audio Pro. Upgraded relay to 24v Omron. RFI capacitor updates. Stereo stereo imaging mod. Function select ground wire mod. All power supply & audio capacitors upgraded. Headphone jack replaced, After-market power switch, works well but requires stronger push-in to stay locked. Unit is in great shape with only minor signs of wear. Light scratching/ fading on the top of faceplate. Knobs have minimal wear/ aging. Fully functional unit with all level III audio pro mods & updates. #8+ condition
$ 888
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Art Pro MPA with Rev6 Mod
# 71596
Had 10dB higher gain preamp. Full audio pro rev 6 modification. Has T. H. E. Tube harmonic equalizer circuit. Updated mic pre with RFI suppression. Updated tube plate volts. Updated low frequency EQ predominance. Phase corrected filter. (No loss of extreme deep bass) Has complete mod of tube vactrol auto compression and EQ at 0 dB. SN 4930. Has box. Condition #9
$ 888
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Bellari RP533
# 60665
Modified with transformer, Automatic EQ compressor. This design allows deep bass and impulse response to be enhanced and less high frequency attenuation and clarity enhancement circuit. Unit has a ground modification and capacitor update for 6db noise floor improvement. This version has a 4560 op amp upgrade for line out balanced out. Mic pre amp RFI suppression capacitor. Modified with first stage tube harmonic bias control (right control) Cleaned switch with silver paste. #9 condition
$ 800
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ART Pro Channel
# 48537
Tube mic preamp/compressor/equalizer. AUDIO PRO MODIFIED: Tube Harmonic T. H. E. Bias control transformer in Vactrol EQ Mod. Highly recommended, Super noise spec machine! QC, Test All. #10 new in box
$ 568
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Email us at sales@audioproz.com or call (617) 926-8020 for more information about ADA modifications and repairs.
Art Pro Channel
# 54689
Modified vactrol variable transformer dynamic EQ, and variable tube bias mod. Professional tube microphone pre-amplifier. Tube/optical compressor. +48V phantom power supply. With true "tube gain cell" compressor. B stock. See more details about the mod here, https://www. Audioproz. Com/AP. Php?Article=19&Tab=Modifications
$ 548
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Bellari RP533
# 50898
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 #9 condition.
$ 520
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Classe SSP-30 7.1 A/V Preamp/ Processor
# 73404
Nice 7.1 surround Preamp/ Processor. Modern/ minimalist faceplate design and aesthetic. Unit features MANY A/V & Audio RCA inputs. Optical digital out, optical 1&2 digital audio in. 7.1 Surround capabilities. NO HDMI.Unit has Titan 108 Chip. Low use time, cosmetically excellent with only some minor signs of wear, light scratches on top of case. Fully functional unit, all controls & connectors are clean & operate well. Digital display is partially faded but still very readable. Some light scratches on top cover but no badly damaged or missing parts. Unit works great. No remote included. #8+ condition
$ 500
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Bellari RP520
# 30179
Tube Mic Pre, Gold Face, VU meters
$ 430
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ART Pro Channel II
# 56014
Class A mic preamp. Tube Preamp, compressor, eq. Super spec unit. Special upgrade. Updated power supply to run any type tube, new, old etc. Unit can run on 90 VAC line current. Special bypass capacitors on power supply. New in box, QC - low noise spec.
$ 388
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Tascam MX80 8 channel Mic Preamp
# 63831
Can use a special add on 48 volt supply, not included with this unit. Some knobs are color blue. Rental Unit excellent serious low noise class A preamp design. #8 condition.
$ 360
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ART Digital MPA II
# 54242
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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ART Digital MPA II
# 54241
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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Art Pro Channel Model 215
# 71285
Like new. All QC checked by Audio Pro. Low noise tubes. In box with manual. #9 condition.
$ 348
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Nikko Beta 20
# 70940
Pre-amp is audiophile grade. 19" Rack mount. Black w/ white lettering. 1 Rack unit. Input: Tape 1, Tape 2, Aux, Tuner, Phono 1 + 2, (Phono switch mm or mc) Super quality class A FET design. Serviced, caps replaced on turn circuit and tested. Good condition. 3 scratches top edge of face panel. (can be touched up) #9 condition.
$ 348
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APT 1 Amplifier Upgrades and Repairs Technical Information: Read more about it here.
Art Pro Channel II
# 59878
Single channel mic pre EQ compressor. SN:S150861225. New
$ 348
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ART PRO MPA II
# 57640
Two channel Mic/HiZ. M/S Matrix. Variable input Impedance. Variable plate voltage. QC- Lubed, Burn-in, switches exercised. #10 Condition (New).
$ 328
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Sumo 0620 Stereo Pre-amp
# 21849
Class A circuitry design pre-amp, very clean sounding unit, very good condition black one-sapce rack mount.
$ 300
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Rotel RTC-940 AX
# 41699
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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ART MPA gold mic pre
# 39767
Sw: MO70103917. Sale
$ 300
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ART TPS 2
# 73026
2 Channel Tube Voicing. Mic preamp with 48V Phantom. XLR & 1/4 In's & Outs. Condition 10
$ 289
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ART TPS 2
# 73027
2 Channel Tube Voicing. Mic preamp with 48V Phantom. XLR & 1/4 In's & Outs. Call for best Pricing. Condition 10
$ 289
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ART Pro MPAII
# 49288
Two channel tube mic preamplifier. New. Highly recommended product!
$ 288
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Dynaco Pat 5
# 27128
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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Parasound C/PT-1000R
# 27851
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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If you are having trouble finding parts, enter the name into our search bar at the top of the page. Please be aware there is a minimum $4-$6 to ship any part. International orders will be $24-$26 to ship for anything larger than an envelope. Shipping costs are non negotiable, so please, PLEASE do not ask for a part, or for us to search for, or quantify a part if you cannot pay for the shipping.
Carver CT-24 Preamplifier Tuner
# 72286
Black face/rack mount, digital AM/FM 10 presets, excellent tuner, use of head phone jack stops audio output by design, FM battery memory OK, re-soldered power supply board and minor service updates, cleaned and calibrated, cleaned all connectors, 1 Phono, 3 Line-ins, 3 Tape loops, NO REMOTE, Condition #8+
$ 268
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Fisher 50-PR
# 27660
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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Rotel RQ-970 BX Phono Pre
# 71215
MM & MC inputs, Simple slimline design using super low noise AD744 OP amp. About 6db of gain extra for MC. Audiophile grade components. Bench test QC, all OK. #9 condition
$ 240
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ART Dual MP Model 254
# 33159
Two channel tube mic preamp - basic tube mic preamp, 48v phantom, in/out level led meter, 1 rackspace
$ 240
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APT Moving Coil Preamp
# 45882
#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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