Audio Proz Service and Sales


Thordarson 24s75

Audio Proz Inv #: 48072

Audio output transformer, can be used as +14 to +24dBm balanced line drive transformer. Primary 500 ohm, secondary 3.2 or 6.8 ohms. 5watts. New in box.

$ 24  Contact Us  

Teac TR-207 transformer

Audio Proz Inv #: 50089

with wires and mounting plate, excellent condition.

$ 24  Contact Us  

Teac 122 transformer UT-3061

Audio Proz Inv #: 46279

Excellent #9 condition.

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Talema ta60E

Audio Proz Inv #: 58775

Power transformer. 115/220 VAC. 9V taps on winding (2) available. 9/10 condition, mounted on board.

$ 18  Contact Us  

Talema ta60E

Audio Proz Inv #: 58774

Power transformer. 115V/220V, 18V taps on winding. (2) available. 9/10 on circuit board.

$ 18  Contact Us  


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.


SLT-5W6-D transformer

Audio Proz Inv #: 46232

with Circuit Board Rectifier (#SUP-3460, TP-N85). Very good #8 condition.

$ 14  Contact Us  

Sescom TR-136A

Audio Proz Inv #: 45055

150/600/10k to 60k/10k. 9pin connector. New old stock.

$ 14  Contact Us  

Scott 311-D parts

Audio Proz Inv #: 45163

We have many parts available for the Scott 311-D tuner, including meters, switches, controls, transformer #138952, TR-6-2, and tubes 6BS8, ECC82, EF94/6AU6, and 6U8A. If possible please provide us with a picture of the part desired. All parts in excellent condition. Meter, $25; various tubes, $8 to $12 each.

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Scott 310-D parts

Audio Proz Inv #: 45165

We have many excellent condition parts available for the Scott 311-D tuner, including meters, switches, controls, transformers, and tubes. If possible please provide us with a picture of the part desired. Meter, $25; Transformer, $12.

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Raytheon UX-7350

Audio Proz Inv #: 48066

Very good #8 condition.

$ 8  Contact Us  

Raytheon 292-11020G1

Audio Proz Inv #: 48068

150/600 ohms, +8dB max level, balanced line transformer in sealed shielded can. Excellent condition.

$ 30  Contact Us  


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 transformer

Audio Proz Inv #: 44753

Old version Transformer #ET-11-186. Good #8 condition--leads are cut short but are still usable.

$ 30  Contact Us  

Musashino TOA OT-333

Audio Proz Inv #: 55914

100 watt, 70 volt line transformer. Condition: 9

$ 24  Contact Us  

Mic Input Transformers

Audio Proz Inv #: 70177

ACEM 70500852 - High quality, superior shielded, 600 to 50k mic transformer, 1" diameter, 12 available ($22 each), 

ACEM 70500166 - 600 to 600 ohm line transformer, up to +14DBM use, similar to most standard fit, 1.5" square fit, (depending use probable fit some square shield around), 4 available ($22 each)

$ 22  Contact Us  

Jensen JE-123-SL 835

Audio Proz Inv #: 48138

Audio transformer for DBX or Behringer output. +24dBm. Very good #8 condition. Pair available. $66 each (call us at 617-926-8020 for best pricing)

$ 66  Contact Us  

Halldorson TR-9

Audio Proz Inv #: 48059

Interstage transformer for audio coupling at guitar or mic level. New in box.

$ 16  Contact Us  

Halldorson TR-54

Audio Proz Inv #: 48062

Tiny size transformer for micro mic or guitar transformer coupling. New.

$ 14  Contact Us  


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.


Halldorson TR-27

Audio Proz Inv #: 48061

New stock.

$ 8  Contact Us  

Halldorson 24s59

Audio Proz Inv #: 48056

Audio output transformer, 5watts, good for mini guitar amp projects or balanced line drive. Primary 25k ohms, secondary 3.5 ohms. New.

$ 24  Contact Us  

Halldorson 22s75

Audio Proz Inv #: 48057

Output transformer, can also be used as unusual mic pre or +24dBm 600 line drive. Primary 7k ohm, secondary 50 ohm.

$ 24  Contact Us  

Freed Transformer Co. No: 32035

Audio Proz Inv #: 55815

Transistor output transformer. Scully part no.020-304-001. From Scully type 280. Scratch on print face, otherwise good shape, #9

$ 140  Contact Us  

Essex Wire Corp C-280-A

Audio Proz Inv #: 48063

Class 1A transformer, in shielded metal can, 1.5" square. 250-4000 to 600 input, or output line balancing transformer. +24dB. Very good #8 condition, pair available.

$ 32  Contact Us  

Chicago Standard Transformer Corp BO-1

Audio Proz Inv #: 44062

Plate voltage to 600ohm output. For tube preamp with feedback tap similar to Pultec. Frequency response 30 - 15000 (+20 DBM), P.W.V. 535. 8 legs. Excellent #9 condition. Pair available, price is per transformer.

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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.


Beyer 80-000-007

Audio Proz Inv #: 71604

High quality 600 ohm input impedance to 50K output impedance, with electrostatic shield,  few available, New item, (priced each)

$ 22  Contact Us  

Behringer OT-1

Audio Proz Inv #: 46540

High quality, shielded input or output transformer, from DBX 160xt or Behringer Composer Pro. For use with most DBX and Behringer products. Perfect condition new old stock. Two pieces available.

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