Soft black matte finish rack faceplate. Chrome handles. Unit also has all Burr Brown. SN# 6254. OPA 2134. Replaced in all line level circuits. Results in a 2db noise floor improvement but really the unit has a 93db to 96db noise with standard A.P. mod. Some light fingernail scratches on face. Unit 3 position high frequency EQ switch, middle position is an analogue EQ for CD. An extremely subtle audio improvement was noticed, but only under the the most critical and best headphone use. #8+ condition
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Rack faceplate with chrome handles. Rack face has minor scratch at rack holes. SN:08950 All level II mods done. 9/10 condition.
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61G333 late version model, black face rackmount with handles. With AudioPro modifications Rev5. See "Custom Mods" page for more details! Excellent cosmetics.
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Serial number J81E223. Level III mod, upgraded: all P.S. caps, all audio caps, headphone op amp, phono EQ circuit. AP correctly updated unit. Condition 9
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Full Level III AP modifications done, super spec with all caps replaced with Tantalum capacitors. Includes kit of 16 crucial transistors, op amps, FETs, and caps for ease of future servicing. Excellent cosmetic 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.
Original version, really nice lightly stropped gray face coloring with light gray purple knobs, nice look with rare and interesting version of cosmetics but still has the look of APT coloring, All Level III Audio Pro Mods, phono update, headphone mod, all audio cap all PS caps, Relay mod, Image control mod, EQ mod, Tone control mod, #9 Condition
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High Quality Reference standard pre-amplifier byTom Holman. This is a stunning looking preamp with a new black pebble face panel and grey knobs- very sharp and Vinces favored look! . Complete Level III modification which includes : All power supply caps upgraded, Audio caps upgraded, relay updated, headphone amp FET spec. All modification to Phono, EQ, Tone control circuits as well as infra filter. Excellent condition #9
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Complete level III update, Rack face, no handle. Minor bends and dents at one rack hole. Slight bend at each side. Flat matte black face. Lettering is perfect. . SN: 2527, but has later version boards. Unit can have another face installed, call. Condition #9. See about Level III mods here. https://www.audioproz.com/AP.php?Article=95
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Audio Pro Modified Level III, Nice low use unit , Ground mods, tone control mods, headphone amp mod, All necessary capacitors replace & phono filter, Relay cleaned & tested, RFI mods. Only minor wear on face and top cover #9- condition
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Top Quality Hi accuracy, very well built product. Complete service , clean and calibration. Inputs: Phono 1 and 2 , tuner, Aux1 and 2, Tape 1 and 2 (Dubbing 1>2 2>1) Level 3 modification by AP. See description here : https://www.audioproz.com/AP.php?Article=95 #8+ condition Minor scuff on face panel.
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Pristine cosmetics and fully functional, Audio Pro Modified level III, capacitor updates throughout all boards, relay replaced, upgraded -super clean operation, All controls and switches multistage cleaning, soldering ruggedized throughout especially any connectors and grounds. Ground mods completed, eliminate any low level buzz or DC bleed. Full calibration and mods level III, Excellent cosmetics only light scratches on top cover. #9 condition
We have been selling and repairing professional and consumer audio equipment for over 40 years. (Read some of our customers testimonials here).
Set for 100 ohm impedance, but can be changed per customer request. (15db gain modified). All caps updated / recapped, noise check, EQ check.OK #9 condition
Mc pre-amp board. Complete. Good condition. Tested and working. Has original caps. #9
PRE Pre-Amp board, phono, 201A board, medium gain version, not updated but works, must be adjusted for specific input impedance, 9 Condition
super low input with super low noise board, tested, may need cap update soon, condition #9
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Moving coil preamp. 75ohm input impedance. Super low noise top board. Serviced and fully tested, with some capacitor updates. Excellent #9 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.
Phono preamp with RIAA equalization. (This is a Mono Device) , Uses 8-pin socket connector. (1 only) Excellent #9 condition.
High performance, solid state design, single channel, one rack space unit. Microphone preamp and equalizer can be used independently. All connections are balanced XLR. Excellent #9+ mint condition, includes manual, original box & packing.
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This Amber Preamp Two is in excellent condition and along with being serviced by AudioPro, has also received upgraded IC chips to 5532 and mute circuits. The back panel connectors have also been resoldered. -TAPE/AUX/TUNER/PHONE/ -Subsonic/Ultrasonic/Tape Filters -Mono/Stereo Switch/ Mute Switch -Balance/Volume Controls -Blackface 2 Unit Rack -Upgraded IC chips to 5532 -Upgraded Mute Circuit -Resoldered Back Panel Connectors
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Pre-amp with 2 1/4" inputs, 2 RCA outputs (male cable end, 10" long), 18 VDC RCA power cable, can use 2 stacked 9v batteries for PS. Includes 2 dynamic mics with long 25' cables, black, slick design. 1/4" splicing block installed on pre, can be removed upon request. Please inquire for more info.
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Comes with remote. RCA & S Video inputs include: DVD, Digital RF, Digital Aux, LD, VCR, Video Aux, CD, Tape, Tuner. NO PHONO INPUT. RCA outs include: Front, Rear, Center, Subwoofer. Many Surround mode settings. 14 FM preset slots. High quality blue boards & Capacitors. Unit has many cool functions, it is recommended that interested customers research these functions online before purchase to see if this unit will fit their needs. Unit has seen very little use time, cosmetically excellent. Faceplate, covers, all controls and connectors are super clean with only minor signs of use (light surface scratching, wear/ staining from age and light use.) #9 Condition.
Tuner/Preamp. CD/Tuner/Aux1/Aux2/Tape in,out/Ext Processor in,out inputs. High blend/ Countour/Bass/Treble/Balance controls. 18 Presets, AM/FM tuner. Black slimline unit with black face and digital display. Super audiophile design, extremely well built, rugged relays. Has manual and remote. Unit is virtually unused, like new condition. Condition #9+
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**We also do work on Adcom**
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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.
AM/FM Preamp (Preamp with built in Tuner). NO REMOTE. 6 db gain change at output circuit. Low noise for headphone out. Used excellent condition, modified unit for better nicer range on volume control. #9 condition
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Excellent basic design, two tapes, 1 aux, no phono, excellent FM, presets. All clean/calibrated. with remote control. #9 condition
