Audio Proz Service and Sales


Webster Electric T-511-1

Audio Proz Inv #: 47643

Telephone line transformer. 10k ohm to 200 ohm, -25dBm. 6-pin connector, shielded can. Excellent condition, two pieces available.

$ 14  Contact Us  

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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UTC P-1245 B-6299-1

Audio Proz Inv #: 48071

Excellent condition.

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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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UTC LMI 50 KR47

Audio Proz Inv #: 48141

Filter transformer. Excellent #9 condition.

$ 20  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.


UTC HE-812 transformer

Audio Proz Inv #: 44241

Like new, in package. Looks to be an interstage matching transformer..

$ 48  Contact Us  

UTC DOT-1 interstage transformer

Audio Proz Inv #: 48058

25:1 imp ratio. Transformer coupler, for mic or guitar. New in box.

$ 16  Contact Us  

UTC CR-725

Audio Proz Inv #: 47525

Primary ohms 100; secondary ohms 600; max level +20dBm; frequency response 1/2dB 30-15Kc. Four pieces available.

$ 30  Contact Us  

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 AR-533

Audio Proz Inv #: 47545

RCA 8446104-1. Input:Output is 1:1.58. Input impedance appears to be variable 50 to 1000, 10K to 50K output impedance. Perfect for high quality mic preamp with variable input matching. Used in very good #8 condition. 4 pieces available.

$ 40  Contact Us  

UTC A-39

Audio Proz Inv #: 55813

600 ohm primary, 2K ohm secondary. Max level +/-10dBM. From Scully type 280. Excellent condition, lettering intact, #9

$ 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.


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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UTC A-21

Audio Proz Inv #: 45451

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

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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-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-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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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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We know you have many options for purchasing audio equipment and parts, and we truly appreciate your business.  We strive to offer good products at competitive prices.  While we can't always match the prices of one isolated reseller, we make up for it by carefully selecting, testing, and finding unique and special rare parts, and we are here for the long run.  We guarantee everything we sell and we hope it helps you to enjoy a great listening experience.

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.


UTC 0-17 C6718

Audio Proz Inv #: 51610

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

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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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United Transformer S-55

Audio Proz Inv #: 49764

for tube filament supply. 6.3v CT, 3amp. Used in very good condition.

$ 16  Contact Us  

United Transformer Corp H-42A

Audio Proz Inv #: 47646

10k to 10k ohm, max level 2dB. Excellent choice for certain tube cathode coupling or direct box matching. Ten pieces available, excellent condition.

$ 22  Contact Us  

Uni-Sync #7512-10k

Audio Proz Inv #: 48129

Input balancing transformer. Very good #8 condition.

$ 12  Contact Us  

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.


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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TOA line transformer

Audio Proz Inv #: 47956

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

$ 8  Contact Us