Audio Proz Service and Sales


UTC A-18

Audio Proz Inv #: 55814

15K ohm - 80K ohm. Max level +/- 15dBM. From Scully type 280. Excellent condition, lettering intact, #9

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UTC A-11 "A65 28" transformer

Audio Proz Inv #: 44061

Primary ohms - 50, 200, 50. Secondary ohms - 50K, P.P. Max level +5DBM. 20~-20KC, 500v hipot. Magnetic shield. 9 leg. Red Print on side. Excellent #9 condition.

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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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Tube Output transformer #562100

Audio Proz Inv #: 43253

NEW STOC. For EL34 type tubes. EIA 606-543, for Fender and Marshall EL34 output. (not available at this time)

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U.R.E.I 8 80 12614-C Transformer

Audio Proz Inv #: 43916

Original transformer. 4 legs. Excellent #9 condition. Pair available, price is per transformer.

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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.


UTC A-18 transformer

Audio Proz Inv #: 44080

D72 44. 15k ohms primary, 80k ohms secondary. Max level +15dbm. 9-leg. Excellent condition.

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UTC A-24 transformer

Audio Proz Inv #: 44083

168-46. 15k ohms primary; 500, 333, 200, 125, 183, 486, 50, 283, 485 ohms secondary. Max level +15dbm.

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UTCCR-725

Audio Proz Inv #: 45057

Transformer UTCCR-725, RCA #B-8480798-1. 100ohm to 600ohm/300ohm. 30 to 15kC, +20dBm. Used in #7 condition.

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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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UTC A-21

Audio Proz Inv #: 45451

50-200 ohm primary and secondary. Excellent #9 condition. Seven available.

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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.


Teac 122 transformer UT-3061

Audio Proz Inv #: 46279

Excellent #9 condition.

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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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UTC LS-12x

Audio Proz Inv #: 44414

Primary ohms: 500, 333, 200, 125, 50. 80ohms secondary. Excellent #9 condition with ribbon connector pre-soldered to pins.

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Altec 1588c

Audio Proz Inv #: 47642

Unusual phantom powered gain circuit and transformer installed in 8-pin octal can. Excellent condition.

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UTC AR-535

Audio Proz Inv #: 48140

Input transformer, 1 to 1.58 ratio, multitap. AR-535, C6748. Very good #8 condition.

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UTC P-1245 B-6299-1

Audio Proz Inv #: 48071

Excellent condition.

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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.


United Transformer Y-6431

Audio Proz Inv #: 49763

Output matching or inter-stage transformer, no specs available. Very good #8 condition with some minor paint scratches on unit.

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UTC 0-17 C6718

Audio Proz Inv #: 51610

Excellent mic input transformer. 500 ohm to 50k ohm, +8dBm. Excellent condition.

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UTC A-18

Audio Proz Inv #: 61327

United Transformer Corp.  9 tap transformer (15k split to 80k split) #9 condition 2 available, (priced each)

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TOA line transformer

Audio Proz Inv #: 47956

Chrome, 4" long, octal pins. Excellent condition. Three pieces available.

$ 8  Contact Us  

Halldorson TR-27

Audio Proz Inv #: 48061

New stock.

$ 8  Contact Us  

Raytheon UX-7350

Audio Proz Inv #: 48066

Very good #8 condition.

$ 8  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.


Uni-Sync #7512-10k

Audio Proz Inv #: 48129

Input balancing transformer. Very good #8 condition.

$ 12  Contact Us  

SLT-5W6-D transformer

Audio Proz Inv #: 46232

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

$ 14  Contact Us