Audio Proz Service and Sales


Dayton Audio APA100 Stereo amplifier

Audio Proz Inv #: 60778

2-input 60 Watts per channel. A and B Speaker Selector, Auto sense of amp signal to turn on and off. Front panel volume and balance control (Easily up-gradable and comprehensive design.) #10 condition, new in box. 

$ 188  Contact Us  

Sony TA-2650

Audio Proz Inv #: 60837

Integrated Stereo Amplifier. Bass, Treble, Balance controls. Aux, Phono, Tuner Inputs. Tape monitor and Tape copy switches, -20db muting switch, acoustic comp switch (presence, loudness). Fully serviced, cleaned, set bias. High current, powerful amp, no speaker relay, quick power up. Great condition, small chip in wooden side panel but otherwise looks great, works great, and has nice big switches. #9 condition

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Yamaha CA-1000

Audio Proz Inv #: 60862

Natural Sound Stereo Amplifier. Normal/Hi/Lo filters, bass, treble, balance, tape, monitor, headphones jack. Speaker switches - A, B, C, A+B, A+C. Inputs - Aux 1, 2, tuner, phono 1, 2, mic. Low use, nice face & cabinet. All maintenance performed. Modified to defeat internal Class A switch, which is a weak design problem that must be corrected. #8+ condition.

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Sony TA-AX44

Audio Proz Inv #: 60869

Legato Linear Integrated stereo amplifier. DAD/AUX, Tuner, Phono inputs. 2 tape monitors, subsonic, hi filters, A/B speaker outputs, balance, bass, and treble. Nice reliable, serviceable design. Unit has low use time, very nice condition, some very minor wear on top of unit. #9 condition

$ 148  Contact Us  

Marantz 1060

Audio Proz Inv #: 61034

Integrated stereo amplifier, 2 speaker selection, hi/lo filter, bass/midrange/treble control, mono L, R, L+R, mic input / (aux) 0.25" phono, phono, tape, tuner, aux 1, 2, silver faceplate with walnut cabinet, 2x switch cleaning removed and updated caps on amp board, wood case has scratches, unit needs TLC, #8+

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Email Us or call (617) 926-8020 for more information about ADA modifications and repairs.


GK MB112II

Audio Proz Inv #: 61061

Bass/keyboard amp, 1x12" speaker. Treble/hi-mid/low-mid/bass EQ. Contour switch, headphone jack, XLR direct out. Custom dampened chassis. Nice condition, very minor marks in a few spots, but nothing major, looks and sounds good. (If requested cab port can be dampened for an even tighter low end) #9 condition

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APT 1

Audio Proz Inv #: 61098

The APT 1 Power Amplifier Owner's Manual. In like new condition. Includes schematic. #9.  

$ 12  Contact Us  

Dynakit Stereo 70

Audio Proz Inv #: 61109

With nice condition cage. It is a functional machine with very low use. Cheaper but good, functioning tubes for outputs (Sylvania EL34) with one spare high quality AR4 rectifier (new). *Rough cosmetic condition. Rusty chassis and transformer. Unit needs a serious clean up of cosmetics. Stereo switch removed. Tube sockets good & tight. Both channels work. Full power check ok, operates well. Requires final bias set up, maybe some resolder work. SOLD AS IS. #7- condition.

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Scott Stereomaster 260-B

Audio Proz Inv #: 61117

Integrated amp, champagne finish, 3 inputs (2 aux, 1 tuner), 1 mic, phono, 2 speaker switching, silver face, tone control in/bypass, all original caps test OK / the Scott sound untouched, very low use - in storage for many years, minor update on capacitors - power switch installed, all switches cleaned #8+

$ 288  Contact Us  

Tascam MH-40

Audio Proz Inv #: 61121

Multi-headphones amplifier.  Input level control.  4 channels with independent level controls.  Channels 1 and 2 have balance control.  Channels 3 and 4 balance knob has been snapped off.  Input level matcher control on rear panel.  Fully serviced and working well.  COsmetic issues are the previous mentioned knobs snapped off, power button has been replaced, input knob is damaged but functional.  Top cover has some scratches and is tarnished in one area.  Well designed unit.

$ 88  Contact Us  

Akai AM 2400 Integrated Amplifier

Audio Proz Inv #: 61339

Great basic design. Wooden case walnut simulated. Variable turnover. Bass 400/200 hz/ Treble 2.5 khz/5khz. Hi/low filters, muting. 2 tape inputs/dubbing. Phono tuner aux. New relay/power supply updates/new caps on front end. Missing handles w/shadow on front. #7 

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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.


Bogen DB20 Series Y-26

Audio Proz Inv #: 61437

Mono tube amplifier. loudness contour switch adjustable -30 db -0b bass, treble. Inputs: Tape, aux, radio LP: AES, NAB, RIAA. All controls clean and good! No leakage around filters caps, (recommended replacement  re-cap). Output tubes: Good, getting slightly hazed, but still has life! GE back plate 6L6 Slightly soft, All tube sockets should to be cleaned. 5U4G needs replacing to operate. Paint very good, nice cosmetics, (bottom scratched). Very well done mono tube and excellent noise floor less than 5 mV. #8+ condition.

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QSC RMX1850HD

Audio Proz Inv #: 61450

2-Channel full-featured stereo power Amplifier; includes level controls, EQ and limiter switches on back panel, Speak-On cables, and banana plugs. Extremely low use amplifier (occasional rental)

$ 440  Contact Us  

Crown XLS 2500

Audio Proz Inv #: 61479

RCA ins don't work, all else functions OK, low use, #8 condition

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Yorkville AP2020

Audio Proz Inv #: 61483

audiophile grade amplifier, super low noise, 2 rack space amp, old school super rugged design, level controls, bridging, function lights, XLR and phone in, Speakon output, low use, all checked, perfect, needs face clean, #9 condition

$ 400  Contact Us  

Dean Markley K-20BX

Audio Proz Inv #: 61548

gain, low mid, high mid, bass, treble, 1 × 8" Dean Markley vintage rock design speaker, cute little practice amp, good condition, few very minor marks, headphone jack currently does not null out speaker (would require rewiring), great student/practice model!, #8 condition

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Beringer Ultra Bass BX1800

Audio Proz Inv #: 61564

180 watt bass workstation, DX loop headphones jack, CD in RCA inputs, -6 db pad switch, 15" speaker with piezo tweeter in excellent condition, unit has some wear, marks, scuffs on tolex, few small tears, grill cloth in great shape, new power switch installed, interior is clean, sounds good, versatile amp, 7+ condition

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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.


NAD 2100

Audio Proz Inv #: 61604

Power Amplifier. 2 speaker switching A/B. Input level control. Soft clipping circuit. Able to bridge mono. Updated

power supply. Installed 2 new relays-high grade. Low use, excellent condition. #9-

$ 268  Contact Us  

Beringer Ultratone K900FX 90 WATT PA/Keyboard combo amp

Audio Proz Inv #: 61663

1 XLR mic/line input, 2 line (1/4") inputs. Graphic EQ, Many onboard reverb, delay, flange, phaser effects settings. No footswitch, 12k fader bulb is out otherwise great condition,  has been custom dampened for better bass clarity.(effects control works but knob needs fitting,) #8+ condition. 

$ 148  Contact Us  

AIR TIGHT Model ATM-3

Audio Proz Inv #: 61689

Tube design Mono block Power Amplifier  (SN: 09209)  Beautiful Silver brushed aluminum face with white VU meter, attenuator control, and 7 position bias control. RCA inputs , 2-4 Ohm & 6-8 ohm  output posts. (has working tube set installed mostly for demo purposes, customer may want t install new set) Fully shop serviced, clean and calibration. Excellent condition cosmetics #8+ (few very minor top & side scuffs)

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NAD Stereo Amplifier 3130

Audio Proz Inv #: 61711

A,B,A+B, speaker settings, Bass, Treble controls, CD, Phono, Tuner, Video/Tape 2 inputs. Better upgrade to many capacitors, and ruggedized board solder.  Unit has original transistors, good quality power supply capacitors, nice condition, clean faceplate. #9 condition 

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AIR TIGHT Model ATM-3

Audio Proz Inv #: 61718

Tube design Mono block Power Amplifier  (SN: 09209)  Beautiful Silver brushed aluminum face with white VU meter, attenuator control, and 7 position bias control. RCA inputs , 2-4 Ohm & 6-8 ohm  output posts. (no tubes supplied in this unit) Fully shop serviced, clean and calibration. Excellent condition cosmetics #8+ (few very minor top & side scuffs)

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Scott A 510 T 520

Audio Proz Inv #: 61924

Compact slim line design. 60 watts peak power. Digital tuner, 8 presets. Easy to use, basic and has slightly warmer sound. Good #8 condition

$ 166  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.


Onkyo Integra A-8190

Audio Proz Inv #: 62193

Integrated stereo amplifier. 100 watts /8 ohm. 6 Stereo Line In's + Phono MM/ MC  Complete shop service; cleaning and calibration. VERY LOW USE, Well made unit , #8+ condition

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Phase linear 200 solid state amplifier

Audio Proz Inv #: 62242

Meter range 0db/-10db, velocity feedback rear panel switches. LED front panel peak responding meters for channels A, B. Cleaned, tested resoldered on 1/17/18. 1 speaker jack tab replaced. Faceplate, cosmetics look great, LED meters fully functional, unit has seen very low use, good condition. Faceplate snapped off from interior plastic braces, glued, repaired, looks good. #9 (original box and packing)

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