Audio Proz Service and Sales


ART SCC

Audio Proz Inv #: 60036

Studio control center. Project series. 10 condition. New.

$ 148  Contact Us  

ART Pro MPAII

Audio Proz Inv #: 49288

Two channel tube mic preamplifier. New. Highly recommended product!

$ 288  Contact Us  

Art Pro MPA with Rev6 Mod

Audio Proz Inv #: 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 Us  

ART PRO MPA II

Audio Proz Inv #: 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 Us  

ART PRO MPA II

Audio Proz Inv #: 57639

Variable impedance. Two channel MIC/HIZ. M/S Matrix. Variable plate voltage switch. QC Lubed, exercised, burn-in. #10 Condition (New)

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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.


ART PRO MPA II

Audio Proz Inv #: 62835

2 channel Tube microphone amplifier. Adjustable gain, impedance, and master output level. Instrument input (high Z). Low cut filter (adjustable). Plate voltage: Normal/High. Worn box mint unit demo unit for rental #9 condition 

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ART Pro MPA (Modified)

Audio Proz Inv #: 34295

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.

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ART Pro MPA (Engineering Unit)

Audio Proz Inv #: 31548

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

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ART Pro MPA (Engineering Sample)

Audio Proz Inv #: 40839

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.

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ART Pro MPA

Audio Proz Inv #: 50897

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.  This unit has been heavily modified.  Read more about the modification here.

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Art Pro Channel Model 215

Audio Proz Inv #: 71285

Like new. All QC checked by Audio Pro. Low noise tubes. In box with manual. #9 condition.

$ 348  Contact Us  


We keep our database up to date with almost 10,000 items in stock. If you see a part number and a price, we have that item in stock.


ART Pro Channel II

Audio Proz Inv #: 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 Us  

Art Pro Channel II

Audio Proz Inv #: 59878

Single channel mic pre EQ compressor. SN:S150861225. New

$ 348  Contact Us  

ART Pro Channel

Audio Proz Inv #: 48534

Tube mic preamp/compressor/equalizer. Super spec QC. Highly recommended machine! New stock. Super spec machine!

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ART Pro Channel

Audio Proz Inv #: 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 Us  

ART Pro Channel

Audio Proz Inv #: 43860

Tube microphone preamp. Audio Pro Modified for tube harmonic enhancement circuit, high quality USA Sylvania 12AX7A tube, also has IN/OUT phase, second harmonic enhance Control. Six stage tube design for preamp, compression, and equalization. New stock fully QC'ed. With true tube "Gain Cell" compressor. Super spec unit.

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Art Pro Channel

Audio Proz Inv #: 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 Us  


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 almost 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 $16 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 MPA gold mic pre

Audio Proz Inv #: 39767

sw: MO70103917. Sale

$ 300  Contact Us  

ART Model 255

Audio Proz Inv #: 43857

Tube Pre-amp system-has high quality super spec 12ax7 tubes (.25 to .5% 2nd Harmonic). 2 channels with balanced or unbalanced outputs. Input for mic and instrument. Very quiet unit even with use of guitar. Later model not as well voiced for guitar overdrives. Modifications are available - Please call. Low use unit # 8 condition. (Tube Test Demo unit)

$ 128  Contact Us  

ART Dual MP Model 254

Audio Proz Inv #: 33159

Two channel tube mic preamp - basic tube mic preamp, 48v phantom, in/out level led meter, 1 rackspace

$ 240  Contact Us  

ART DPS

Audio Proz Inv #: 34294

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.

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ART Digital MPA II

Audio Proz Inv #: 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 Us  

ART Digital MPA II

Audio Proz Inv #: 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 Us  


We offer expert time-saving advice on repairing many types of home and studio equipment, as well as consulting for product and recording issues, at a fair and reasonable cost.  For complex matters, we sometimes must charge a small technical fee.  If we can help solve your repair problem or technical conundrum, give us a call.  (617)926-8020.


Aphex 107 tubessence

Audio Proz Inv #: 53204

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.

$ 188  Contact Us  

Aphex 107 Tubessence

Audio Proz Inv #: 53824

2 channels, tube gain stage preamp design. Like new unit, has better high-quality power supply. Minor scuff on top. In rack. Condition: 9

$ 188  Contact Us