Audio Proz Service and Sales


Panasonic SV-3700 DAT Machine

Audio Proz Inv #: 16104

Hrs. Mercury time use indicator almost at halfway mark, but unit has been cleaned calibrated heads aligned clutch tightened - Full AP Shop Service.

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Denon DNT620

Audio Proz Inv #: 19049

CD/Cassette pro rackmount

$ 629  Contact Us  

Bellari RP-533

Audio Proz Inv #: 23734

Heavily modified by Vince. 7 new switches, overdrive control, combo mic pre/comp/eq with many added features. Low noise high gain tube modification. 2 Band Bass/Treble. Front panel paid gain/phase switch. Tape saturation control. Smooth fast compression switch. High gain / bright switch. Power supply ground mod. Transformer EQ optical mod. This is the cats meow! Call for details 617-926-8020. Top flight cosmetic condition #8 with just a tiny bit of rack rash. 

Some additional information customers have asked about:   This unit is 90% all tube, the op amps are for RMS, DC control, balanced out not audio! What I do is make the circuits have more head room less noise better tube character and more correct RMS detector tracking. As you may have noticed the output circuit clips badly and is nowhere close to semi-pro level. It's a wrongly done balanced line op amp stage. Also the compressor threshold and ratio controls are too sensitive, as such the unit can go into a strange and not very likable distortion if pushed. There is some good basic design circuits in this, but just not enough. My mods are not about installing fancy parts it's about improved circuit performance

$ 680  Contact Us  

Marshall 9005

Audio Proz Inv #: 27842

4-space rack design Stereo power amp, full TUBE design, Audio Pro modified. Designed by Marshall the Guitar amp co. Dual EL 34, converted to home audio quality hifi amp. Ruggedized, fresh tubes, call for details.

$ 780  Contact Us  

ART DRX digital multi fx

Audio Proz Inv #: 28091

single space rack unit, excelent shape. stereo in/out. 2 second sampler and multi effect. Excellent shape.

$ 200  Contact Us  


Need your guitar or bass amp tuned up? We are now doing repairs, upgrades, and modifications to all types of guitar amps. Orange, Mesa Boogie, Fender, Marshall, Hughes and Kettner, Peavey, Ampeg, Gibson, Silvertone, etc. Read more about it here


Audio Technica ATW-1031

Audio Proz Inv #: 30167

Rackmount Wireless Diversity System. Belt pack frequency 13C (211 MHz). With 1/4" connection for guitar. Also includes AT-830cx Lavalier mic. Like new, #9 condition. ** Special Sale! **

$ 360  Contact Us  

Klipsch KP-250 IIA

Audio Proz Inv #: 32062

Pro Box, 12" woof, 3-way design 2 horns mid and hi, recessed carry handles, recessed cup hole for "large" pole stand, banana and speaker inputs, composite corner and edge protection, 60 lbs each, AP added 1/4" input connection, selling as pair, will sell one for $500.

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Audio Technica AT4071A

Audio Proz Inv #: 38007

Line/Gradient shotgun condenser capacitor microphone. Particularly useful for miking dynamic action in film/TV audio as well as in “spot” miking techniques in the music studio or theater. Like new condition, obvious display box wear. (no foam windscreen)

$ 568  Contact Us  

Sennheiser ME66

Audio Proz Inv #: 42697

shotgun mic, excellent #9 condition.

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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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CAD Trion 6000

Audio Proz Inv #: 44554

Multipattern condenser microphone with omni, figure eight, and cardioid pick up patterns. AP Rev3 modified! -10dB pad is vintage dampening to remove stridency and make less sibilant and warmer. High pass filter is dip filter, pulls mid vocal back, source seems farther away. Welded board grounds. Upgraded capacitors. Superspec quiet unit. Pattern switching takes longer due to improved power supply.

$ 280  Contact Us  


OUT OF STATE CUSTOMERS:
Contact us if you are interested in purchasing an item.
We prefer PayPal payments.
We only ship to VERIFIED PayPal Addresses
For customers who do not have a PayPal account we also take Credit Card over the phone.

Please be aware that there is a minimum $4-$6 to ship any part.


CAD Trion 8000 Tube mic

Audio Proz Inv #: 46246

Three position pattern tube microphone. New stock, tested, QC'ed, and burned in by AP. Low noise tube. Includes flight case, shock mount, cable, and power supply. Selected low noise tube, we recommend this mic for vocals, and acoustic instruments. #10 condition Call for best pricing!

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Teac A-3440 4-track recorder

Audio Proz Inv #: 47596

1/4" 4-track tape, with 10" (hub adapters may be available- for additional cost). 4-track simulsync machine, 7.5/15 ips. Calibrated for Maxell UD XL Ampex 456 tape. Excellent cosmetic and mechanical condition, professionally serviced, thoroughly tested, with new belt, new pinch roller, 80% good heads, (original box and packing probably available). now #9 condition

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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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Bellari RP533

Audio Proz Inv #: 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 Us  

Martin Logan Script

Audio Proz Inv #: 52638

wall mount electrostatic speaker, 41" tall with mounting to wall bracket, black with black metal grills, sweep tested - all panels and woofer are ok, comes with original box, packing, manual and 2 AC cords, condition #9, 1 pair. New Lower Price.

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Pioneer RT1050

Audio Proz Inv #: 53352

Large reel, 7 1/2 and 15 IPS. High speed semi pro version 1/4 Track. Stereo format. With pioneer hub adapters in pioneer road travel case. Bias 2 for high speed, bias 1 for 7 IPS. All clean. Calibrated. Modified for better HF EQ. NICE. 9+ condition. Speed runs 1% fast by design.

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Local customers, please do not come to the shop without calling ahead first - (617) 926-8020 - for an appointment, so that we can more efficiently help you with your equipment or sound recording needs.

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.


Otari MX 5050 B2 HD

Audio Proz Inv #: 53600

2 track rec play, 4 track play head. Low use but much finger wear from editing face #7 condition. #8 mechanical heads 90% good. SN 18302122. #8 condition. Cleaned. Calibrated. Edit, speed switch replaced, some lettering worn away at function buttons. Calibrated for Ampex 456, Maxell.

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Tascam 22-4

Audio Proz Inv #: 53775

4 track, pinch control, smooth running, transport heads 90% or better. Low, 7 inch reel. 7 1/2 IPS 15 IPS excellent performance. Recent new belts, pinch roller, complete/calibration. Setup for ampex 456 maxell UD tape. 9 condition.

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Pioneer SX-727

Audio Proz Inv #: 53889

Classic vintage receiver. Silver face panel with Blue lighted dial and Walnut case. 2 sets of speakers - Uses special connectors - 2 provided.  Unit in good working order. Controls : On/Off, Bass, Treble, Balance, volume, Inputs: Aux In, phono 1&2, with 2 Tape monitors. Excellent Tuner. FM calibrated and aligned - Cleaned, gone over and updated. Improved Diff  amplifier transistors.  Scaled volume control for better level setting. Minor Power supply updates. Replaced meter lamps with cool blue bulbs. Face panel has 2 different blue bulbs. Unit has seen virtually no use.  #9 condition (almost mint, except case has few scratches on wood). (For Local sale only)

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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  

Technics SL-B5

Audio Proz Inv #: 54702

33/45 RPM with pitch adjust. Memo-gram, 7", 10", 12" size selector. Silver chassis. Frequency generator servo. Automatic, start/stop button. New AT311EP cartridge with white stylus. Dust cover 7/10. Unit 8+. RCA jacks installed on rear (modified). New belt, motor oiled, fully calibrated.

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Teac X-1000 R

Audio Proz Inv #: 55334

10" Reel Recorder, Auto Reverse. with NAB hub adaptors. Black face version. Complete professionally cleaned calibrated. Heads & Mechanics excellent, recent new belts, like new Pinch. (RC-100 wired remote is available additional $130 Listing # 54640) 8+ condition 

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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. PLEASE NOTE THAT SHIPPING INTERNATIONALLY WILL BE A MINIMUM OF $16 EVEN FOR SMALL PARTS.


Pioneer RT-1011L

Audio Proz Inv #: 55390

3 motor, 3 head stereo tape deck. 1/4 track stereo format. Large/small reel selector, Hi/Lo speed. Left/Right record on/off switches. Bias, EQ STD/LH switches, tape/source monitor switch. 1/4 inch mic ins on face. 1/4 inch phones out. L/R mic, line level controls, L/R output control. Silverface unit with analog counter. Fully serviced and calibrated to Maxell UD 35/Ampex 456. Head 80% good. Speed runs 1/2% high by design. Modification to Rec Bass EQ to nicely improve deep bass response and tape / drive levels. Big VU meters, now has hub adapters (9/10 condition), has original manual and schematic. 9/10 condition.

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Behringer Truth B2031P (pair)

Audio Proz Inv #: 56025

For sale Audio Pro Rev. 4/5 Modified passive version. New. 2 way passive monitor speaker (pair). Audio Pro modified. Rev 4 Design. Custom cabinet damping. Model 2031A are amplified speakers. I suggested 2031 passive design, and to use any good 40-100 Watt amplifier. Check out the Behringer website for a picture. A modified set is $448. We modify the 2031 to be a near field monitor where midrange tone is "warmer" or slightly receded image by a 3db through about at octave between 800 - 2000 H3. A far field monitor version is slightly brighter or stronger midrange and designed to listen at 4 to 8 feet distance. Basically flat response is perceived at that range. Near field version is for 2 to 5 feet away listening, and indeed most BSEE acousticians agree that a near field should be dipped in midrange. In both cases, the modification consists of improved multi section crossover (it presently has a very simple 4-part crossover) as well. We install a dampening blanket between the internal chambers, dampen tune one of the port slots and finally apply soft felt clone dampeners to improve midrange level and tonal match to crossover. The cabinet is now tuned to reproduce 40 Hz powerful and clean. The speakers are very heavy design with cast frame woofer, using high density MDF cabinet, very well done. No grill cloth is included by design. Shipping can be $38 or so to get them to you.

$ 488  Contact Us