Audio Proz Service and Sales

eBay Facebook

Category:

Preamps
( 213 Preamps sorted by Price High to Low.)
Image 1 Image 2
Filter Results:
Image 1 Image 2
Filter Results:
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
Contact
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
Contact
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
Contact
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
Contact
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
Contact
Need an APT unit serviced or modified? Vince, the owner of Audio Pro, ran the production line at APT for many years, and has decades of experience working with APT products. Read all about our APT Holman service and mods here. Also read about the APT Moving Coil Phono Mod Here
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
Contact
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
Contact
Tascam MX-80 Mic Mixer
# 22246
8 channel mic preamp, add on 48v power, extremely high gain low noise full bandwidth mic pre, 2 space rack unit, excellent conditon
$ 360
Contact
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
Contact
Art Pro Channel II
# 59878
Single channel mic pre EQ compressor. SN:S150861225. New
$ 348
Contact
Art Pro Channel Model 215
# 71285
Like new. All QC checked by Audio Pro. Low noise tubes. In box with manual. #9 condition.
$ 348
Contact
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
Contact
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
Contact
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
Contact
We leave "SOLD" items on our website for machines that we often repair and provide parts for. This is to give you an idea of the products we typically carry, and direct you to alternatives you may not know about - we often have substitutes for out-of-stock parts, and are happy to recommend workarounds and different solutions to common problems.
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
Contact
Tascam MX80 cahnnel Mic Preamp
# 63831
Add on 48 volt, some codes are color blue. Rental Unit excellent serious low noise class A preamp design. #8 condition.
$ 300
Contact
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
Contact
ART TPS 2
# 73026
2 Channel Tube Voicing. Mic preamp with 48V Phantom. XLR & 1/4 In's & Outs. Condition 10
$ 289
Contact
ART Pro MPAII
# 49288
Two channel tube mic preamplifier. New. Highly recommended product!
$ 288
Contact
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
Contact
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
Contact
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
Contact
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
Contact
We have been selling and repairing professional and consumer audio equipment for over 40 years. (Read some of our customers testimonials here)
We keep our database up to date with over 10,000 items in stock.
If you see a part number and a price, we have that item in stock.
Customers outside of the US, please note that international shipping can be costly (US Post $24 minimum - up to 8oz or 226g).
We are glad to combine orders to reduce shipping costs.
Take a look at our shipping policies for more information and estimates of prices and shipping time.
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
Contact
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
Contact
APT Holman Moving Coil Phono Preamp
# 61575
Set for 100 ohm impedance, but can be changed per customer request. (15db gain modified). All caps updated / recapped, noise check, EQ check. OK #9 condition
$ 240
Contact
Onkyo P-301 Remote Controlled Stereo Preamplifier
# 73402
Nice Modern Minimalist looking black design, good bright green digital display. Phono, CD, Tuner, (2) tape loops, AV1 Front RCA input, AV2 RCA record & play. Variable loudness, bass, treble, and balance controls, source direct & simulated stereo functions. Low use time unit, only minor ware, some oxidation on back panel. With original remote, All functions tested OK. #8+ condition
$ 228
Contact