Audio Proz Service and Sales


Aphex 107

Audio Proz Inv #: 46133

Two channel thermionic mic preamp. New in box.

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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.

$ 148  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

$ 168  Contact Us  

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 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 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.

$ 400  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 MPA gold mic pre

Audio Proz Inv #: 39767

sw: MO70103917. Sale

$ 300  Contact Us  

Art Pro Channel

Audio Proz Inv #: 46218

New stock, Super low noise, QC by AudioPro. Microphone preamp, compressor, and EQ. Is a super spec machine! Incredible quality and condition.

$ 330  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!

$ 330  Contact Us  

ART Pro Channel

Audio Proz Inv #: 48537

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

$ 330  Contact Us  


Customers outside of the US, please note that international shipping can be costly ($14-16 minimum for anything larger than an envelope). Take a look at our shipping policies for more information and estimates of prices and shipping time.


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.

$ 480  Contact Us  

Art Pro Channel

Audio Proz Inv #: 54689

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  Contact Us  

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

$ 298  Contact Us  

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.

$ 900  Contact Us  

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 (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 (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 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)

$ 328  Contact Us  

ART Pro MPAII

Audio Proz Inv #: 49288

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

$ 288  Contact Us  

ART TPS II

Audio Proz Inv #: 55438

Tube with variable bias. Modified for more professional tube equalization, settings for tube gain are more subtle. REV 6/7 with modified circuit and control to adjust tube harmonics engineering sample. #8 condition

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FYI, Around the database you will often see us describe the condition of units on a scale of 1-10. #10 would mean the product is new from one of our suppliers, such as Behringer, Audio Technica, etc. #9 means the product is in perfect condition but is used, #8 implies there are some minor cosmetic scratches but unit is mechanically perfect, and so on and so forth.


ART TPS II

Audio Proz Inv #: 41413

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.

$ 480  Contact Us  

ART TPS II

Audio Proz Inv #: 45936

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  Contact Us