Audio Proz Service and Sales


NAD 7220PE Stereo Receiver

Audio Proz Inv #: 72907

Classic NAD design, Digital AM/FM display, Phono, CD, Video (aux) & 1 tape loop. Soft clipping switch on back panel. Audio Pro serviced, cleaned all switches and controls, check test phono and line in's, amp bias all Ok. FM tuning must be on odd numbers 104.1, .3.5.7 etc. (Speaker B is set to operate as MAIN speakers, and  engaging "extra speaker" button will mute output to allow headphone listening. Speakers A are set to always be on.) #8 condition,  some ware on face and minor scratches on top cover.

$ 288  Contact Us  

Nakamichi Receiver 2

Audio Proz Inv #: 72904

Nice, modern looking black receiver with digital display. AM/FM tuner, CD, Phono, Video, and Tape. Tape rec/ play. Tuner has saveable preset memory. Relays recently cleaned, boards were inspected & Resoldered. Independent speaker relay (A+B). Preamp in/out. Excellent FM, some basic mods, relay updated. Better version Taiwan made unit. All service done. Very clean faceplate and covers. No broken or damaged parts, some minor signs of wear and age. Fully functioning unit. #9 condition

$ 388  Contact Us  

Pioneer SX-850 Stereo Receiver

Audio Proz Inv #: 72884

Beautiful, silverface vintage Pioneer design. Capacitors in power supply were replaced and upgraded. Old caps weren't bad but were upgraded regardless. FM indicator bulb was replaced, has a slightly stronger orange glow than the rest of the indicator bulbs but it looks nice. All controls and connections were double cleaned and tested. Relay was removed, cleaned, serviced and re-installed. Solder points on power supply board were reinforced and made more rugged. All 2SC1313 transistors were replaced with 2N5500 lower noise type transistors. Some resistors in power supply were upgraded as the original parts are known to heat up over time. 6db pad added to amp board for a nicer range/ response from the volume knob. FM was calibrated and has excellent stereo lock-in as well as signal strength. Faceplate and display are in good condition, some light scratches on the top of faceplate. Wooden case is in great shape with only some minor signs of wear on the corners/ edges. All controls and connectors are in good condition with only light signs of use and wear. Very low use unit, cosmetically and functionally great. #8+ condition.

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Technical Pro RX38UR Receiver

Audio Proz Inv #: 72826

Unit features (2) 1/4" phone jack microphone inputs with Echo, Treble, Bass controls. Bass, treble, balance controls for speaker outs (No EQ for Headphones). Inputs include: RCA Aux, RCA DVD, SD Card, USB. Outputs include: RCA Line out, RCA Sub out, Surround speaker and Main speaker terminals. No FM stereo in this unit, though it does have wide range for FM bandwidth and has no trouble locking into stations. Many other features on unit such as recording straight to USB from AUX and DVD in, many remote functions such as FM scan and specific FM station input using numbers on remote. Comes with remote and owners manual. Very low use unit. No Signs of damage or wear, fully functional and cosmetically excellent. Comes with original box and packaging. #9+ condition

$ 88  Contact Us  

NAD 7140 Stereo Receiver

Audio Proz Inv #: 72821

Gray face with digital display. Relay replaced & Modified with ground wire. Soft clipping controlled by selector switch. Mono/ stereo bridging function. 4/8 ohm impedance selector switch. Very clean, low use unit. Cosmetically excellent with no broken parts. All controls & connections very clean. Unit only shows minor signs of use. Unit functions excellently. Relay was modified with ground. #9 condition.

$ 348  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.


Pioneer SX-828 Stereo Receiver

Audio Proz Inv #: 72730

Nice Silver Face unit with blue display. Dimmer control not operational, permanently set on a nice dim level. Relay cleaned and serviced recently. Reinforced Solder points throughout boards and on all controls. FM calibrated (45 db Channel Separation) Unit has virtually no use time and has all original bulbs. Better version Low Noise Transistors in preamp and amp boards. Lubed/ Oiled tuner mechanics for smoother dial movement. Added resistor pad to volume control for smoother volume increase, less dramatic change in volume when using knob. Thermal check for phono. Updated Power supply with better regulator. Very Clean unit with nice faceplate and controls. Nice wooden case with few signs of wear. Beautiful, fully functional vintage unit with solder updates and recent relay service. #9+ Condition **Contact Us By Phone (617-926-8020) For Best Pricing**

$ 1200  Contact Us  

NAD T-754 AV Surround Receiver External 7.1

Audio Proz Inv #: 72676

Top quality design/ built version of NAD. Tone control, tone defeat, surround modes, level controls. , S VHS Input, component video in. Check internet for list of features as this unit has many. Relays tested, in excellent, clean condition. Basic testing done on machine, tested OK. Did not test all OUTS but looks good. Includes original remote.#9+ Condition

$ 300  Contact Us  

Sony STR-AV1070x

Audio Proz Inv #: 72397

Black face AM/FM Receiver, 3 tape loops, 1 DAT loop,  CD and Phono inputs, 7 band EQ with spectrum analyzer.  Re-soldered main board where required, buffed & cleaned relay contacts & surround relays. Better quality Sony product. (remote not included) Good condition low use unit. #8+ condition.

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Sony STR-6200F FM Stereo Receiver

Audio Proz Inv #: 72396

Vintage silver face unit, (2) phono (3) aux in  (1) tape loop-1/4 stereo tape out on front panel. (Typical "thicker" sound of Vintage design) FM tuner is slightly higher distortion by design, could be improved with modifications. No AM,  One FM signal meter not functional. Cleaned switches & controls 2x, heat ran 2hrs+, all OK. Value is for the preamp amp and vintage style appeal. #8 condition

$ 248  Contact Us  

NAD 7155

Audio Proz Inv #: 72391

70 Watt per channel, excellent best series design from NAD, has moving coil preamp board installed, Japanese version with better grade parts and Nichicon capacitors and boards, connectors etc. double up power switch, clean all controls 2 times, some updates of capacitors and touch up ruggedize board soldering at amp board and regulators circuits, upgrade speaker relay. Memory battery okay. FM calibration is excellent,.. unit in very low use condition, was stored for years due to minor problem. Condition #9

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Yamaha CR-820 Stereo Receiver

Audio Proz Inv #: 72324

Silverface w/ Wooden case. High quality relay & Capacitors. Relay cleaned and serviced (2023). Ground mod added to reduce low level hum and noise. High quality solder throughout all boards. Any weak solder points were reinforced to be more rugged. Tuner varicon is very clean and has excellent FM stereo lock in (this design does require tuning into target station slowly to achieve full FM stereo lock.) Unit has seen very little use time. Original bulbs are still good. Cosmetically and functionally excellent.  Faceplate is very clean with only minor signs of wear. Wooden case is in excellent, very clean condition. All rear connectors and faceplate knobs are completely intact and in excellent, clean condition with only minor wear/ staining from age and use. #9 Condition.

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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.


Harmon/Kardon HK330I

Audio Proz Inv #: 72309

Newer version, slim line Champagne finish face Ultra wide band linear phase stereo receiver, 40 watt per channel,  nice phono preamp, 1 tape 1 Aux FM AM, slim dial Analogue tuner, , update Phono caps to non polar, complete service, unit has low use, all caps checked, FM calibration, Condition #9 

$ 238  Contact Us  

JVC RX-501

Audio Proz Inv #: 72261

Step up quality, digital look design, 10+ station FM presets, 60 watt, CD, Tape, 2 high quality phono, nice basic look, no remote, some modifications done to update power supply, all serviced and cleaned, condition 9

$ 166  Contact Us  

Yamaha RX-V377

Audio Proz Inv #: 72183

AV Receiver (5.1), (complete w/ remote and calibration mic) CD Rom owners manual, 4 HDMI Inputs, 1 HDMI Output, 1 USB Input, 2 Component Video Input, 1 Component Video Output, 2 Coaxial Audio In, 1 Optical Input, 1 Analog Audio Input, AM/FM Tuner, Sub Woofer Output, Front Speakers A/B, Center, Surround, QC'd Tightened Grounds and added star washer to back panel to improve grounding, good condition #8

$ 209  Contact Us  

NAD 7130

Audio Proz Inv #: 72145

Basic receiver, CD, phono, aux, tape inputs, soft clip circuit, FM calibration, 5 preset FM, 50 watt per channel, Taiwanese made, ruggedized board soldering, upper right hand front panel chipped, unit has low use time, removed connector glue, some basic NAD and A.P. updates, some capacitor changes, condition #8+

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Marantz 2240 Stereo Receiver

Audio Proz Inv #: 72138

All updated blue front panel bulbs, installed RFI protection capacitors in phono stage and amp board and volume control, updated some basic power supply parts, relay update, excellent FM calibration, all mylar bypass power caps on gain level of volume control, main supply and amp board is now nicer range in middle, RCA jumpers at in/out amp, 1 pair of output transistors replaced, wood case, minor little chips tiny scratches, unit has seen very little use,  condition #9

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Yamaha RX-A700 AV Reciever

Audio Proz Inv #: 72119

90 watts (x7), FOR USE AS BASIC STEREO RECEIVER, multi channel input and PreOuts, Sirius Ready, Remote Included, NO phono input, NO HDMI or 5.1 function, checked for functions, dust shield added, Double Relay, Condition #7

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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.


Sherwood RA-1140

Audio Proz Inv #: 72102

AM/FM receiver, slim line nice basic unit - black, orange digital display, quartz lock tuner, 18 presets, inputs: tape, aux, CD, phono, 2nd set speakers allows surround sound effect, inserting headphones will disconnect speakers by design, low use unit, all basic service, condition #9

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Criterion Mark V receiver

Audio Proz Inv #: 71967

Silver face, yellow dial light up, 2 tape ins / phono, aux in, very good tuner, excellent FM, power supply mods for cleaner sound, 50 watts per channel, wood look metal cast, yellow dial, LED bulbs, very well done designed unit, condition #9

$ 288  Contact Us  

Yamaha CR-440 Stereo Receiver

Audio Proz Inv #: 71959

Vintage silverface design. Virtually no use time, cosmetically and functionally excellent. Ground mod added to main boards (Mods Recommended by Yamaha in the past) Replaced bulbs for FM Signal and tuning VUs with nice, mellow Red LEDs giving the unit a very unique look. FM tuner has been aligned and calibrated excellently to really lock into FM stations. Relay removed, cleaned and tested. Very clean unit with almost all original parts and no damages. #9+ condition

$ 400  Contact Us  

Harmon Kardon 330B

Audio Proz Inv #: 71955

Vintage silver face, green FM dial, AM/FM stereo, phono/tape amp/AUX, bass and treble EQ, stereo balance control. Fat vintage sounding design, all serviced FM alignment, some bulbs done. Condition #9

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Sansui 9090

Audio Proz Inv #: 71833

Vintage Silver face unit, Original Walnut case, complete A.P service, cleaned and FM Alignment and calibration, set bias, 110 watt at 8 ohm (All Blue LED lights, Face stays lit all the time Mod), Power switch double contact Mod, (Surgistor AC 120 Mod), Relay Mod, Unit had work done to AMP board to thicken some board foil, 4 inch scratch on case top, some minor dents, #9 Condition 

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Sansui 9090 Stereo Receiver

Audio Proz Inv #: 71825

Beautiful vintage silver face. This version has Blue Display that stays lit on all functions. Analog FM tuning indicators & power meters. Almost no use time. No bulbs replaced. Has some basic Sansui recommended mods, been totally cleaned and calibrated with excellent FM. With Mod speaker Relay. All functions test okay. Very minor wear on bottom wood panel and a few scuffs on top case. Bass control has very slight bend. Comes with custom fit box (not original) and packing ready to ship. Absolutely stunning perfect condition.   #9+ condition

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OUT OF STATE CUSTOMERS:
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Please be aware that there is a minimum $4-$6 to ship any part.


Technics SA-400 AM/FM Stereo Receiver

Audio Proz Inv #: 71821

Basic 36 Watt Amp, Silver look, Excellent Analogue FM, 2 speaker, 2 tape and dubbing, Good Phono, Aux in, all service, some cap update, board rugged, some obvious wear on switches, #8 Condition

$ 368  Contact Us  

Advent Model 300

Audio Proz Inv #: 71762

Has preamp/amp jumper, FM tuner excellent, modified/tightened speaker switches, some caps replaced, filter caps changed out, AM clean low use, Has various scrapes and rubs on top cover, Bad dent on top right face plate, #9 Condition

$ 348  Contact Us