Audio Proz Service and Sales


Beyer DT-990 Premium

Audio Proz Inv #: 55521

250 ohm. Free shipping in the U.S. New (M.I.A.)

$ 380  Contact Us  

Beyerdynamic DT-250 Headphones

Audio Proz Inv #: 35639

Sealed back Pro foam 80 Ohm Impedance

$ 160  Contact Us  

Beyerdynamic DJX-1

Audio Proz Inv #: 43700

25ohms, closed back design, rotating ear cups, single sided cable, 1/4" and 1/8" connectors. New stock, package has slight shelf wear but item is brand new and unused.

$ 150  Contact Us  

Rolls RA62

Audio Proz Inv #: 32700

headphone amp, 6 separate headphone outs, each channel has individual level control and insert, main in and stereo in, as new in box

$ 148  Contact Us  

Behringer HA-4000

Audio Proz Inv #: 42424

Headphone distribution amp, 4 channels. Multiple patch points, very flexible unit. High power, capable of driving wide variety of studio headphones. Left, right, mute, mono switches. Fully inspected and cleaned. A higher quality and rugged original unit. Excellent, #9 condition. Manual included

$ 140  Contact Us  


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.


Beyerdynamic DT 100

Audio Proz Inv #: 56347

Closed back stereo headphones (200 ohm elements). Sweep tested, all OK. Full size 1/4 TRS connector end. Used as shop demo, low use time. Excellent condition, recent update high isolation ear pads. #9 condition (no Beyer box).

$ 138  Contact Us  

Audio Technica ATH-M50XBT Bluetooth Headphones

Audio Proz Inv #: 72509

45mm Elements 38 ohms, up to 40 hours of battery life, Includes 1 foot USB Charging Cable and 3 foot wired stereo mini to mini cable (non original), Black Vinyl pouch, like new, missing original box, excellent fidelity, bluetooth and mini input tested OK, quick start guide sheet, Condition #9+

$ 128  Contact Us  

Sennheiser RS-40 Wireless Headphones

Audio Proz Inv #: 36099

925 mhz - 3 selectable frequencies w/2 battery packs and chargers

$ 120  Contact Us  

Rane HC6

Audio Proz Inv #: 55188

6 Channel, high current Has power supply No rack scratches but minor tape stains. Serviced mechanically. Excellent low use. Outboard Power Supply Available

$ 120  Contact Us  

Tascam MH-40

Audio Proz Inv #: 42839

Multi-Headphone amplifier. RCA and 1/4" inputs. 2-space rackmount. 4 1/4" headphone outs with balancing level controls. RCA in or 1/4" separate left/right levels. All controls and switches cleaned. Very low use, excellent #9 condition.

$ 120  Contact Us  

Koss/ E.9

Audio Proz Inv #: 55073

Electrostatic Stereophone audio box energizing source, (1) Studio monitor KOSS ESP.9 Electrostatic Stereophones 6' cable Full size ear cups/ hi isolation ear pad still puffy and fit ok. Lean bass integration design to operate with speaker or line level input. #8 condition.

$ 120  Contact Us  


All Remotes are now 25% off or Free Shipping!!!  (Reel to Reel remotes excluded).


Sony RF Wireless Headphone System MDR-RF985RK

Audio Proz Inv #: 59669

Includes headphones, ac adapter, transmitter, connecting cable, 3 channel. #10 New

$ 108  Contact Us  

Sony RF Wireless Headphone System MDR-RF985RK

Audio Proz Inv #: 59673

Includes headphones, ac adapter, transmitter, connecting cable, 3 channel. #10 New

$ 108  Contact Us  

Apex HP100 Studio Headphones

Audio Proz Inv #: 72160

Folding design; 58 ohms; modular cables, 1 straight and 1 10'coil, 1/8" tip with 1/4" adapter. New.

$ 108  Contact Us  

Apex HP100 Studio Headphones

Audio Proz Inv #: 72162

Folding design; 58 ohms; modular cables, 1 straight and 1 10'coil, 1/8" tip with 1/4" adapter. New.

$ 108  Contact Us  

Apex HP100 Studio Headphones

Audio Proz Inv #: 72163

Folding design; 58 ohms; modular cables, 1 straight and 1 10'coil, 1/8" tip with 1/4" adapter. New.

$ 108  Contact Us  

Apex HP100 Studio Headphones

Audio Proz Inv #: 72164

Folding design; 58 ohms; modular cables, 1 straight and 1 10'coil, 1/8" tip with 1/4" adapter. New.

$ 108  Contact Us  


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.


Apex HP100 Studio Headphones

Audio Proz Inv #: 72165

Folding design; 58 ohms; modular cables, 1 straight and 1 10'coil, 1/8" tip with 1/4" adapter. New.

$ 108  Contact Us  

Apex HP100 Studio Headphones

Audio Proz Inv #: 72166

Folding design; 58 ohms; modular cables, 1 straight and 1 10'coil, 1/8" tip with 1/4" adapter. New.

$ 108  Contact Us  

Apex HP100 Studio Headphones

Audio Proz Inv #: 72167

Folding design; 58 ohms; modular cables, 1 straight and 1 10'coil, 1/8" tip with 1/4" adapter. New.

$ 108  Contact Us  

CAD Audio "The Sessions" MH510 GD Headphones

Audio Proz Inv #: 57084

With 2 cables (10' straight and 3.5' coiled). New in box.

$ 96  Contact Us  

Alesis Microcue Amp

Audio Proz Inv #: 53135

2 stereo inputs, stereo line out, 2 headphone out, 9 volt power supply provided, low use, condition #9

$ 88  Contact Us  

Tascam MH-40

Audio Proz Inv #: 61121

Multi-headphones amplifier.  Input level control.  4 channels with independent level controls.  Channels 1 and 2 have balance control.  Channels 3 and 4 balance knob has been snapped off.  Input level matcher control on rear panel.  Fully serviced and working well.  COsmetic issues are the previous mentioned knobs snapped off, power button has been replaced, input knob is damaged but functional.  Top cover has some scratches and is tarnished in one area.  Well designed unit.

$ 88  Contact Us  


We are presently operating on an APPOINTMENT ONLY basis. Please call us first at (617) 926-8020 to schedule an appointment before you come into the shop for repairs, rentals, product recommendations, consultations, or anything other than minor purchases.


Sony MDR-NC7

Audio Proz Inv #: 54099

Noise canceling phones. NEW.

$ 58  Contact Us  

AKG 240M element

Audio Proz Inv #: 46548

New stock, tested and good. Complete element with large black frame. 3 5/8" diameter. Pair available.

$ 54  Contact Us