Audio Proz Service and Sales


Otari 5050 MKIII playback head

Audio Proz Inv #: 43594

8 track, 1 half inch record/play head. With mounting shell and platform. New stock.

$ 540  Contact Us  

Otari 5050 MKII

Audio Proz Inv #: 53715

Guide posts for 1/4 tape deck.

$ 8  Contact Us  

Otari 5050 Mk3 CB-116 remote and cable

Audio Proz Inv #: 48844

Autolocator and cable, both in excellent condition.

SOLD  Contact Us  

Contact us about similar items or replacement parts.

Otari 5050 MK 3-8

Audio Proz Inv #: 49458

 8 Track, Pinch Roller, with new rubber (black). Has good bearings. Can sell one at a time. #10 condition 

$ 98  Contact Us  

Otari 5050 Mechanical Counter

Audio Proz Inv #: 44755

#7 condition.

$ 14  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.


Otari 5050 flutter roller

Audio Proz Inv #: 46531

1.5" wide, 1" tall. Black with concentric ring design. Very good #8 condition.

$ 24  Contact Us  

Otari 5050 center spindle

Audio Proz Inv #: 46776

For 5050 Series and other machines. 1.5" long "bullet style" center spindle with axle mount and screws, no reel table. Bullet stem fits into 15/16" hole onto reel table. Look carefully, this is a strange variation of the Otari stem!

$ 26  Contact Us  

Otari 5050 button frame

Audio Proz Inv #: 72582

Black plastic frame (6" 2/16L  x 13/16" W) excellent condition #9

$ 16  Contact Us  

Otari 5050 BIIF

Audio Proz Inv #: 60176

(1) Main Board PB9A168C $48. (1) Back panel with connectors #9 $24. (1) Switch board PM-680-1 3 buttons all wires attached for color code $48. Motors, brakes PLEASE CALL. Parts were from non working unit. Some basic cleaning and care may be required when using.

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Otari 5050 BII Reproduce Head

Audio Proz Inv #: 56412

1/4 track, 1/4 inch tape. Head was 80% good and is lapped to near perfect condition. Leads attached. 9/10 condition.

SOLD  Contact Us  

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Otari 5050 Bii pinch arm

Audio Proz Inv #: 51440

with solenoid plunger spring. Excellent condition.

$ 18  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.


Otari 5050 BII Motor Speed Board

Audio Proz Inv #: 56211

Motor speed board YG-6731 94V-1. Used board. Intact, clean. Came from working machine. Capacitors in circuit check OK. Comes with partial motor with hall effect sensor board.

$ 68  Contact Us  

Otari 5050 BII Knob Kit

Audio Proz Inv #: 56245

CH1 / CH2 / Output knobs, KN1063, KN1065, 2 sets of 4 pieces total, original lock screws intact, comes with two clear plastic insulators.  Note: 1 white dot cap is missing from 1 knob      Condition: 8

$ 28  Contact Us  

Otari 5050 bII head cover

Audio Proz Inv #: 48886

With splice box attached for 1/4" tape. Very good #8 condition, obviously used at splice block but otherwise very nice. Mounting screws included.

SOLD  Contact Us  

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Otari 5050 BII Head Block Plate

Audio Proz Inv #: 56416

Head Block Plate with 4 head mount. 2 head shields. Circuit board no. PB-781A with switch 2T-4T which is forward position (not up). No heads included. 9/10 condition.

SOLD  Contact Us  

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Otari 5050 BII for parts

Audio Proz Inv #: 54755

Digital Counter, Board Display 9/10, $38. Flutter roller $24. Back arm tension guide with cap $16. Button bezel for play, FF, etc. 9/10 $12. Meters good but sever glass wear (good for swap mech and bulb into good meter glass) $20. Button bezel for on, speed, etc. $12. 6 buttons for function (small) $6. Stop Button $8. 2 bottom feet 8/10 SOLD. Bottom panel 9/10 $8. Back cover 8/10 $8. Capstan motor and board 8/10 $160. Knob kit (6 pieces) in, out, mic 8+/10 $16. Reel tables 8+/10 $26. Head cover with 1/4 track splice block, very used, razor scratches, but otherwise nice $48. Front tension arm $16. Speed control knob $12. Reel table with platform to fit motor axle, complete $40. Top vent trim 9/10 $20.

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Otari 5050 Bii 2tr playback head

Audio Proz Inv #: 47901

Barely used, #9+ condition, 5% wear.

SOLD  Contact Us  

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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.


Otari 5050 BII 2 track head block

Audio Proz Inv #: 71962

complete (1/2 track) assembly includes switch board, 4 head, (1/4 track playback head is worn out) but 2 track (1/2 track)  play head is 85% good, as it was replaced at one time, 2 track (1/2 track ) record head is 70% good, and heads are in near perfect correct alignment

$ 240  Contact Us  

Otari 5050 BII

Audio Proz Inv #: 51988

Trim ring for capstan motor. Screws on cosmetic part. 1" diameter. #10 condition.

$ 14  Contact Us  

Otari 5050 BII

Audio Proz Inv #: 54771

1/4 track hub adapter. Adapts 10inch reel. TW-670. Can substitute KW0H009. Fits bullet spindle. Excellent condition, #9 $88 ea

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Otari 5050 BII

Audio Proz Inv #: 56415

Erase head. Half-track quarter-inch tape. Nice condition, obvious low use. 8+ condition

$ 48  Contact Us  

Otari 5050 BII

Audio Proz Inv #: 53702

Face escutcheon. Overlay grey dress plate(sits upon aluminum sub plate with vent grill). Many minor dings near cue mech, otherwise very nice #8+ condition.

$ 28  Contact Us  

Otari 5050 B2 HD

Audio Proz Inv #: 60175

(1) Back panel with connectors $34. (1) Transformer output board $48. (1) Bottom panel, black $14. For Motors, Brakes PLEASE CALL. All parts have low use were working machines but may require calibration or cleaning of trimmers or switches.

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If you are having trouble finding parts, enter the name into our search bar at the top of the page. Please be aware there is a minimum $4-$6 to ship any part. International orders will be $14-$16 to ship for anything larger than an envelope. Shipping costs are non negotiable, so please, PLEASE do not ask for a part, or for us to search for, or quantify a part if you cannot pay for the shipping.


Otari 5050 B2

Audio Proz Inv #: 54706

Side panels, Grey covered wood with handles & hardware screws. Very minor chips on some plastic washers. 2 minor chips on bottom edges of panel, otherwise nice. 8- condition

SOLD  Contact Us  

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Otari 5050 B2

Audio Proz Inv #: 58883

Digital counter bezzle. Purple window. 9/10 condition, minor scuffs.

$ 16  Contact Us