Audio Proz Service and Sales


Otari MX-5050 BIIHD function buttons

Audio Proz Inv #: 49991

for play, ff, rewind, etc. Excellent condition. Note: play button SOLD can be substituted as a stop button SOLD, but is less wide. 1 red button available at this time. could be used as play button or other if colored black.  $12 each #9 condition

$ 12  Contact Us  

Otari MX-5050 BII-2 knobs

Audio Proz Inv #: 49310

(4) input line "ring" knobs with slip washer, $12/ea. Note:  No Top Knob  #9 condition

$ 12/ea  Contact Us  

Otari MX-5050 BII side panels

Audio Proz Inv #: 50847

1 pair of side panels with no handle cups; vinyl clad charcoal finish with cut outs for cupped holders. Comes with side screws and caps (8). Dimensions: 20 4/16" L x 8 2/16" W (3 5/16" to center holes). Some small chips and dings are on one panel. Condition: 8. SALE PRICE IS FOR PAIR

SOLD  Contact Us  

Contact us about similar items or replacement parts.

Otari MX-5050 BII reel tables

Audio Proz Inv #: 50843

2 available (price listed is per each). Reel tables with bullet spindle. Condition: 9

$ 88  Contact Us  

Otari MX-5050 Bii pitch control PB9A561

Audio Proz Inv #: 50014

with board, lead wires, and knob.

$ 18  Contact Us  


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 MX-5050 Bii pinch roller arm

Audio Proz Inv #: 51240

includes pinch roller arm, springs, and pull rod. Excellent condition.

$ 18  Contact Us  

Otari MX-5050 BII head cover

Audio Proz Inv #: 49308

with Otari logo and 1/4" splicing block and head mount screw. Heavily used in good #7 condition.

$ 58  Contact Us  

Otari MX-5050 Bii HD parts

Audio Proz Inv #: 50140

Top/Back panel external light scuffs, minor rust/surface pitting internally. 8+ condition. $28 for the pair. (Vinc to find more)

$ 28  Contact Us  

Otari MX-5050 Bii HD cosmetic head covers

Audio Proz Inv #: 50138

Pair of matching cosmetic metal pieces designed to cover head assembly. Good #8 condition, nice but with some obvious wear. One 9.5" long, the other 6.25" long. Price is for the pair.

$ 20  Contact Us  

Otari MX-5050 Bii HD button

Audio Proz Inv #: 49992

1 Black button, for speed, edit, etc. Excellent 9/10 condition.

$ 10  Contact Us  

Otari MX-5050 Bii flutter roller

Audio Proz Inv #: 50006

Supply side flutter roller assembly complete with tachometer wheel and mounting hardware (tacho optical not included). Excellent condition.

$ 58  Contact Us  


We are a very different kind of shop. To help ensure a smoother experience please read our letter about our current shop policies.

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 Bii button frame

Audio Proz Inv #: 50010

for edit speed, etc. Excellent condition.

$ 14  Contact Us  

Otari MX-5050 Bii button frame

Audio Proz Inv #: 50013

for play, stop, etc., function buttons. Excellent condition.

$ 16  Contact Us  

Otari MX-5050 BII bottom vent panel

Audio Proz Inv #: 50846

15 11/16" L x 3/4" D x 1" H; Condition: 9

$ 18  Contact Us  

Otari MX-5050 BII bottom panel

Audio Proz Inv #: 50845

Black embossed rolled steel with 4 corner screws. Dimensions: 15 10/16" L x 7 3/16" D x 3/4" H; Condition: 9

$ 18  Contact Us  

Otari MX-5050 Bii board PB9A172

Audio Proz Inv #: 50008

includes output SRL board, LED board, switch, and mounting hardware. Excellent condition.

$ 8  Contact Us  

Otari MX-5050 BII (B2) top rear panel

Audio Proz Inv #: 50844

15 10/16" W x 6 14/16" D x 14 10/16" H. Minor back scuff but otherwise in excellent #9 condition. (1 ) available.

$ 28  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 MX-5050 B2HD pinch roller

Audio Proz Inv #: 49994

with cap and screw. Very good condition.

SOLD  Contact Us  

Contact us about similar items or replacement parts.

Otari MX-5050 B2HD head block connector

Audio Proz Inv #: 55957

Green, 14 pin. Has intact wiring harness. Condition: 9

$ 16  Contact Us  

Otari MX-5050 B2 Metal Face Plate

Audio Proz Inv #: 50878

For surrounding area around head block ass'y with screws #9+

$ 30  Contact Us  

Otari MX-5050 B2 Head

Audio Proz Inv #: 55958

Reel motor with brake and hub assembly. MR1C012. On original mount.  Has PB9A179A PCB with 6.5 MF Cap. Salvage from working unit. 2 available. $48 each.

$ 48  Contact Us  

Otari MX-5050 B2 HD

Audio Proz Inv #: 50002

2 White button, 1 Black, for Rec, Sel, Rep, Monitor salvage #8

$ 8  Contact Us  

Otari MX-5050 B2 Face plate

Audio Proz Inv #: 50875

with logo and model "MX 5050" and labeling for: Power, Speed, Reel, Edit, Record, Play, Stop, Rew, FFW   with hardware - 1 available  Speckle Black  #8+ Condition

SOLD  Contact Us  

Contact us about similar items or replacement parts.


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.


Otari MX-5050 B2

Audio Proz Inv #: 50877

Pitch control metal knob with allen screw fastener #9 condition

$ 8  Contact Us  

Otari MX-5050 B2

Audio Proz Inv #: 50880

Pair plastic face plate rings for reel table area 4 5/8" diameter with screws #9 salvage

$ 12  Contact Us