Audio Proz Service and Sales


Otari MX5050 B

Audio Proz Inv #: 53299

Power Supply Board PB9A171B. Crucial parts replaced and updated. From well used but operational deck with color code connectors left intact. ( Board update and power supply caps - $88 value ) #8 Condition.

$ 196  Contact Us  

Otari MX-5050 4 Track

Audio Proz Inv #: 15467

4 Track 1/4" reel to reel, Unit with meter cables in/out, needs minor repairs, heads in excellent condition.

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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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Otari CB-116 Transport Controller

Audio Proz Inv #: 53318

For MX5050 MKIII -8, possibly others. With 32' cable. 2A-54C with original box. 9+ Mint condition.

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Otari CB-116 Remote Controller

Audio Proz Inv #: 44372

Auto locator and cable. Very good #9 condition with very minor surface scuff and ding in bottom corner of remote. LED tips have cracked off display holes, need little bezels installed to be more visible.

$ 440  Contact Us  


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.


Otari CB-110 Rec Play Counter Remote

Audio Proz Inv #: 44375

8 channel Rec/Play counter remote with cable. Very good condition with very minor scratches on face.

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Otari 5050 mk3 PINCH ROLLER

Audio Proz Inv #: 42885

#10 condition, new stock!

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Otari 5050 B-2HD

Audio Proz Inv #: 57447

2 track 1/4 record play. Has switch on top of head with internal speed switch - does 15, 7 1/3, 3 3/4 (internal switch reset motor speed). Has old side Otari press fit hub adapters. Heads are 75% good. Unit has been cleaned and calibrated; we re-soldered the power supply board and motor board; calibrated to semi-pro level for use with all kinds of tapes. All mechanics are good. Better side boards. Face cosmetics are nice. Overall, there is obvious wear all over, but this is a good performing machine. #8- condition

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Maxell Tape

Audio Proz Inv #: 70148

Four (4) available, 35-180 UD, Used tape, Tests OK for shedding, Known customer kept tape in good storage, Condition 8+

$ 26  Contact Us  

Magnetophone 300 reel to reel

Audio Proz Inv #: 41134

1960's era, 4 inch reel to reel, with leather case, very good condition. With origional mic, untested proablly can work with service.

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Magnetic Reference Laboratory

Audio Proz Inv #: 53407

Reproducer calibration tape. 1/2 inch, 15 IPS EQ IEC-1 Ft = 0 & 4500 Hx. 250 NWM/M. Multi frequency 0dB. 8+ Condition Low Use. May be slightly sticky at some areas. $120 each.

$ 120  Contact Us  


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


Magnacord 1028

Audio Proz Inv #: 48148

1/2 track, 7.5/15 ips, with 10" hub adapters. Tube preamp record and play. Excellent #9+ heads, mechanics, rollers, etc; very good #8 condition case with some stains. Very low use time. Completely cleaned, calibrated, tested at AP. Missing one cosmetic screw on top of case.

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Fostex 20/80 Pinch Roller

Audio Proz Inv #: 28909

E2B Series, Fostex # 8260203201 Pinch Roller for 1/4 inch tape. New XA910BX

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Calibration Tape

Audio Proz Inv #: 28063

We can make calibration tapes for 1/4 and 1/2 track machines on brand new tape. Just drop us an email request at sales@audioproz.com and be sure to include you model number.

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Akai X-1800sd

Audio Proz Inv #: 50024

Cross field, super deluxe, with 8-track stereo cartridge. Totally intact unit with low use time, in need of basic servicing.

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Akai metal 10inch 1/4" tape reel

Audio Proz Inv #: 44415

Excellent #9 condition, but box in rough shape.

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Akai M-9

Audio Proz Inv #: 51705

7" reel machine with built in preamp and speakers. Excellent condition. Contact us for details.

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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.


Akai GX-77

Audio Proz Inv #: 63928

PARTS - Failed machine, Heads good, pinch roller worn but clearly still in good condition, Machine appears to have bad capstan motor - Call - possible substitute motor available ($48), all cosmetics parts look good, (Head cover/door assembly - SOLD) Substitute motor $48, 2 erase Heads plus brackets $60 ea, All record heads and play heads SOLD,  (See our listing #72894 is playback head for AKAI) 2 Pinch rollers worn but clearly still in good condition, needs basic cleaning $34 ea, Condition #8 Many other parts available, call directly 617-926-8020 we have belts, hubs, tables etc.

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Akai GX-630D

Audio Proz Inv #: 57238

10" Reel, Direct drive motor system with 10" NAB Akai hub adaptors ($80 value). 7 1/2 / 3 3/4 speed stereo 1/4 track. The Wood Case is #9 condition. Very clean machine and Very slight (almost not noticed) oxidized stain on some areas of meters and controls with one minor scratch on head cover. 50/60Hz/ 100-240V operation. Pinch roller good with 1 minor dent, very reliable design. All calibrates to within +-/db both channels to 15kHz

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Akai GX-625

Audio Proz Inv #: 55391

4 Track, 2 channel Stereo Deck. Left/Right Line/Mic Level controls. 1/4 inch mic input on face, 1/4 inch headphone out. Tape/Source monitor, wide range low noise tape selector. 3 3/4, 7 1/2 inch tape speed. Rec mute on/off. Output level control, digital counter/minute feature. Silverface unit. Fully serviced, minor staining on face. Excellent calibration (Ampex 456/Maxell UD35). Has hub adapters and original manual. 8+ condition.

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AKAI GX-4000D

Audio Proz Inv #: 64430

(2) speed 7 & 3-3/4 ips ,  7" reels self locking hubs, mic ins, This recorder does awesome sound & sound echo reverse effects, incredibly excellent record & playback.  Total clean / calibrate for Maxell UD Tape. #9 condition absolutely superior condition machine.

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Akai GX-4000D

Audio Proz Inv #: 59483

7 Inch Reel, 1/4 track stereo. Excellent. Mint condition. Calibrated to rec/play. Maxwell UD and Ampex 456. Output control at #6 is 0db reference. Low use. Condition: #9

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Akai GX-365D

Audio Proz Inv #: 27257

Good front panel cosmetics, runs at 1 7/8, 3 3/4, or 7 1/2 ips. Sound on sound capability. Two 1/4" mic inputs on front. Stereo analog meters on front. Input for optional remote on rear. RCA in/out on side panel. Minor scratches on top and sides, left rell arm bent. Unit is being sold as is for parts or to hobbyist.

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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.


Akai GX-270D

Audio Proz Inv #: 27290

Excellent front panel cosmetics, minor dings on side wood panels. 7 1/2 and 3 3/4 ips speeds available. Low noise and wide range recording options. 2 1/4" mic inputs on front, RCA ins and outs on back (stereo). Connections for optional remote on back. High current draw on start up.

This is a unit for parts or repair only. It would be fixable in the hands of a good tech but we simply did not want to invest our time in it. Best to call for a more detailed description.

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Akai GX 4000D

Audio Proz Inv #: 57905

Excellent performance. Mic inputs, mixing. 7" reel. 3 3/4 & 7 ips. Nice compact RtoR. Serviced +85% heads + excellent heads calibration.

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