Audio Proz Service and Sales


NOS RCA 50C5

Audio Proz Inv #: 45305

New old stock tube with original but slightly crumpled box.
Most of our tubes are listed without pricing information. If you see something you like, make us a competitive offer and we'll sell them at a price that will make you happy!

Contact Us  Contact Us  

NOS RCA 12AY7/6072

Audio Proz Inv #: 45328

New old stock tube with original but in good condition.

Contact Us  Contact Us  

NOS RCA 12AT7/6201

Audio Proz Inv #: 45329

New old stock tube with original but slightly peeled box.

Contact Us  Contact Us  

NOS Raytheon 35C5

Audio Proz Inv #: 44125

New old stock tubes. Pair available.

Contact Us  Contact Us  

NOS Raytheon 12AT6

Audio Proz Inv #: 44118

New old stock tubes. Pair available.

Contact Us  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.


NOS National 5751

Audio Proz Inv #: 45326

New old stock tube with original box in good condition.

Contact Us  Contact Us  

NOS Lafayette 12AX7A

Audio Proz Inv #: 45265

New old stock tubes. Pair available.

SOLD  Contact Us  

Contact us about similar items or replacement parts.

NOS JAN 6V6GTY

Audio Proz Inv #: 45316

New old stock tubes. Pair available.

Contact Us  Contact Us  

NOS ISM 50C5/HL92

Audio Proz Inv #: 45264

New old stock tubes. International Service Master. Original boxes in OK condition. Pair available.

Contact Us  Contact Us  

NOS International C tubes 6HU6 EM87

Audio Proz Inv #: 45302

New old stock tubes. Two each available of 6HU6 and EM87. With slightly tattered original boxes.

Contact Us  Contact Us  

NOS International C EF86-6267

Audio Proz Inv #: 45211

New old stock tubes with original boxes (slightly tattered). Pair available.

Contact Us  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.


NOS International C 5Y3GT

Audio Proz Inv #: 45304

New old stock tubes with original but tattered boxes. Pair available.

Contact Us  Contact Us  

NOS International C 12BH7A

Audio Proz Inv #: 45318

New old stock tubes with original boxes in good condition.

Contact Us  Contact Us  

NOS GE KT66/7581

Audio Proz Inv #: 44177

New old stock tubes with original but tattered boxes. Pair available.
Most of our tubes are listed without pricing information. If you see something you like, make us a competitive offer and we'll sell them at a price that will make you happy!

SOLD  Contact Us  

Contact us about similar items or replacement parts.

NOS GE 7581A KT66 tubes

Audio Proz Inv #: 43810

Pair. New old stock tubes with original boxes (slightly tattered). Pair available.

SOLD  Contact Us  

Contact us about similar items or replacement parts.

NOS GE 7581A for HH Scott

Audio Proz Inv #: 44178

New old stock tubes. Marked HH Scott. Made in USA. Pair available.

SOLD  Contact Us  

Contact us about similar items or replacement parts.

NOS GE 7247 tubes

Audio Proz Inv #: 44114

New old stock tubes. Many available.

Contact Us  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.


NOS GE 6SN7GTB tubes

Audio Proz Inv #: 45262

New old stock tubes with original but tattered boxes.

Contact Us  Contact Us  

NOS GE 6EA8

Audio Proz Inv #: 45210

New old stock tubes with original but tattered boxes. Three pieces available.

Contact Us  Contact Us  

NOS GE 6BX7GT

Audio Proz Inv #: 44122

New old stock tubes with original but tattered boxes. Pair available.

Contact Us  Contact Us  

NOS GE 6BN8

Audio Proz Inv #: 45322

New old stock tube with original but tattered box.

Contact Us  Contact Us  

NOS GE 6BN6

Audio Proz Inv #: 44181

New old stock tubes. Pair available.

Contact Us  Contact Us  

NOS GE 6AU4GTA

Audio Proz Inv #: 44123

New old stock tubes with original boxes in good condition. Pair available.

Contact Us  Contact Us  


All Remotes are now 25% off or Free Shipping!!!  (Reel to Reel remotes excluded).


NOS GE 6AG11

Audio Proz Inv #: 45263

New old stock tubes. Original boxes in OK condition. Pair available.

Contact Us  Contact Us  

NOS GE 6201

Audio Proz Inv #: 44180

New old stock tubes. Four pieces available.

Contact Us  Contact Us