Super Quality Preamp, Much class circuit design, (2) new upgrade quasi op amp circuit for phono section. (2) other modules (original) have been opened and re-soldered mini circuit board, double up on Mylar preamp coupling caps. Excellent Noise Floor, MC transformer installed type 8020 40ohm load. Most caps replaced in power supply (small value types) All calibrations done for preamp module D.C. offset, new status bulbs. case and cover has few minor scuffs, Face is #9 Very low use machine #8+ condition
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Absolute top quality Class-A circuitry! Open discrete op-amp module upgrades. Low-use time, excellent condition. Part of matching 3-piece set. Also included are Luxman 5M521 Amplifier (see # 24128 in amplifiers), and Luxman 5T50 Tuner (see #24126 in receivers). We would like to keep this beautiful system together, so the PRICE IS FOR THE WHOLE SYSTEM not just the preamp.**SPECIAL WHOLE SYSTEM SALE**
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Slim line aluminum, Linear phase EQ! Very high-quality parts & controls, exc phono pre. (1 module pulled - - no phono!)
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Vintage preamp, silver face with black inset, bass / mid / treble controls with turnover 250hz 4kHz, phono 1 / 2, tape 1/ 2, tuner, aux inputs, *back panel RCA's have been replaced (metal plate was cut to fit new RCAs), fully serviced, excellent condition, all basic service, condition #9
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Headphone out, hi-filter, montor source/ tape, left/right balance slider, bass/ mid/ treble sliders, loudness, tone mode selection. Beautiful unit in excellent functional and cosmetic quality. Better version electronics (tantlum caps). Clean face with minor signs of use. Aftermarket feet installed on bottom. #8+ Condition
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Need an APT unit serviced or modified? Vince, the owner of Audio Pro, ran the production line at APT for many years, and has decades of experience working with APT products. Read all about our APT Holman service and mods here. Also read about the APT Moving Coil Phono Mod Here.
Stereophonic Preamplifier. SN: AK2903. Aux, Tuner, Phono 1 & 2, Mic, and Tape HD Inputs. R/L Controls for both Bass and treble, headphones, and tape in/out jacks. This unit is fully serviced and tested. One capacitor added to improve power supply. Cleaned all controls, switches, jacks, tightened connectors, checked phono noise, and a 2nd switch cleaning. Includes all original packaging, owner's manuals, factory harmonic distortion test graph, cabinet available also. #9 condition
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Basic phono preamp, 1 stereo input, 1 stereo output, Black case (4"x2.5"x1.5"), Good condition (#9)
Preamp, 600 ohm in, 8 ohm out, input/output volume control, small add on line box converter for installation/adapting audio signal - call for details
Phono/Aux/CD/Tape1/Tape2/Tuner in. 2 outputs, 2 band bass/treble tone control. Capacitance load switch. Does moving cartridge or moving magnet. #8+ condition with some minor scratches on top cover. All controls and switches cleaned. Fully tested. No noise or modulation.
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Stereo preamplifier - Gray with black knobs - Slim unit. Inputs: 2 tape (1+2) Tuner, Aux, Video, CD, Phono (MM) Outputs: 2 Preouts and Headphone (1/4" Jack). When headphones are plugged in, Pre outs are muted -Nice feature! Very nice quality basic preamp with good phone stage. Low use #9 condition
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Stereo preamp with headphones out, phono/MM/MC in, aux/tape/CD in, monitor listen switch. Excellent basic audiophile preamp. Professionally cleaned, serviced, tested.
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We have been selling and repairing professional and consumer audio equipment for over 40 years. (Read some of our customers testimonials here).
Stereo Preamp. Tuner, Phono, CD, Aux 1, Aux 2, and Video inputs. Loudness, and low level switch. Bass and treble EQ controls. Infrasonic filter switch. #8+ condition - Minor scratches and wear on face and top cover.
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Pre amplifier, superior design, gunmetal gray, rack mount with rack handles, excellent phono stage, MM + moving coil class A fet design, eq circuit with turnovers (3), (bass 50/120/250 treble 3K/6K/12K), external processor (EPL loop), cosmetics excellent, low use, all control switches cleaned, #9
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Fancy high preamp. Class A module design. Slimline design. Bass/treble controls. MM, MC input. Headphone out. Unit does indeed have little more clarity in over all design (subtle). Some power supply upgrades of crucial resistor and rugged resoldering. #9 condition.
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Basic as new demo high quality phono preamp. 9/10 condition.
Stereo preamp, Good phono preamp, all controls and switches cleaned
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Control Amp. (2) Phono in with selectable MC/MM, 3 position cartridge loading switch, and 3 position gain selector. Tuner, CD, Aux 1 and 2 inputs. (2) Tape loops, and (2) set main RCA outputs. (Has some DIN connectors for Tape, CD, Tuner). Complete cleaning and serviced by AP. No remote, Missing (2) function selector gap covers. #8 condition. Missing (2) Function selector gap covers for CD and Tuner
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.
Receiver converted into PREAMP. Black faceplate. Phono, CD, Video 1, Video 2, Tape 1, and Tape 2 inputs. 10 tuner presets. Built on (non-original) volume knob, with cut hole for LED indicator. #7 condition
Disital Surround Processor/Preamp. CD/Tuner/Aux 1/Aux 2/Tape/Video 1/Video 2/Video 3/Video 4/ TV/SS inputs. Adjustable millisecond delay/ channel inversion/ adjustable echo. Dolby surround/Hall/Matrix/Creation modes. Adjustable left/right input level. Nice line level remote preamp, excellent surround processor. Blackface unit with digital display. Ruggedized grounds, updated power supply. Unit has remote. Condition #8+
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Up to 76dB gain in 6dB increments, selectable high pass filter at 40, 80 and 140Hz, XLR mic level inputs and XLR +4 dB outputs.
Pre-amp is audiophile grade. 19" Rack mount. Black w/ white lettering. 1 Rack unit. Input: Tape 1, Tape 2, Aux, Tuner, Phono 1 + 2, (Phono switch mm or mc) Super quality class A FET design. Serviced, caps replaced on turn circuit and tested. Good condition. 3 scratches top edge of face panel. (can be touched up) #9 condition.
Stereo preamp with box, packing, and manual, 1 1/4 rack space (non standard) power supply mods, 2 simultaneous ins/outs, sound proc loop, phono, tape monitor, bass treble
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Preamp - Stereo, modified (PS, headphone, regulator stage, tone control for better signal to noise), unit in excellent 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.
Stereo Preamp, On front panel 2 input mixing/monitor, 3 external processor loops, resoldered, modified, cleaned, new power supply
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Better quality phono, tone control slider a little sticky, but works, special enhancement EQ control. #7, missing front bezel. 7 inputs.
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