Phono in, 6 line level inputs, front panel in black, nice EQ. #9
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moving coil preamp
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Tuner Preamplifier, Very good tuner, Digital Display, Excellent condition, PS and ground mods to eliminate hum, modified headphone out to be super quiet
The Parasound P/FET 900II is a Class A circuit preamp using audiophile grade componets, with a full featured set of ins and outs, slim black faced design, and this particular unit has our improved grounding mod which helps reduce any unwanted hum in the signal path. The unit is in excellent condition and like all our items, it has been cleaned and inspected by Audio Proz to ensure you are receiving the highest quality products. -Inputs: Tape 1/Tape 2/Video/CD/Tuner/Phono -Record Out on Tape 1/2 -Bass/Treble/Balance/Loudness/Volume Controls -Tone Defeat/ Mono Switches -No Headphone -Black -AudioProz grounding Modification -Condition #9
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This Parasound P/SP-1000 has low use and has been all calibrated and all serviced by Audiopro to ensure the unit is in excellent working condition. -AV Processor/Pre-Amp -LD/Video 1/Video 2/Tape/Line Inputs -Dolby Pro Logic -Reverbs: Stadium, Hall, Club -Preamp Direct Option, Bass EQ Switch - 15/20/30ms Delay -Subwoofer/Rear/Center Levels -Overload and Front Balance Knobs -2 Space Rack Mount
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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.
nice, basic preamp, EQ, updated with TL075 op amp for tone controls (lower distortion, noise), did 250pf and 18k resistors on all input jacks for RFI protection, did 50pf RFI protection on phono input, revised more correct grounding for phono input, updated power supply capacitors and improved grounding, nice face, not original bass controls, # 8 + condition
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Preamp - 3 band sweepable parametric EQ, selectable EQ bandwidth, tone bypass, 2 tape monitors, 1 aux input. Low filter, mute and loudness switches, cleaned and calibrated, Modified - Call for details
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Autocorrelation preamplifier. Unit has seen extremely low use time. All controls switches board connectors cleaned corrected power supply per Phase Linear update, some IC sockets and best noise version op amp installed. Repaireds some RCA inputs and fortified them with glue. Replaced various capacitors anywhere in unit which measured off spec (about 20 caps changed). Install "star ground" modification to reduce noise and RFI ruggedize all board connectors auto corrector circuit. Spec of unit noise floor and channel matching is excellent! Tracks excellent +/-1db channel match!
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Discrete transistor phono preamp. Has discrete version 4 channel decoder board and Phase Linear updated / best version auto correlator. RCA's in excellent condition. SUPER SPEC CALIBRATED ! channel balance +/- 1db or better (one of the most accurate units we have seen) 90% Of all power supply caps replaced & upgraded at boards and main supply. Upgraded grounding on boards and ruggedized solder at board connectors. ( By design this version 4000 does not lower the audio out signal to totally off at the back panel RCA. A very low level audio signal will always exist. The unit can be modified with a few resistor changes to be totally off if requested at sale) Low use unit, face and knobs #9 condition
Full function stereo pramplifier, silver face, 120/240v switchable, fully cleaned and tested, truly excellent cosmetic condition.
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Basic Preamp. This is an excellent quality product, with high quality controls, switches. Input switching IC is same as expensive products. Low noise op amp for phono. 3 band eq. Some ground mods were done. rack mount. #9 condition
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Stereo preamp with Tuner, Aux, CD, Mic, and Phono inputs. Tape, mono, low filter, and muting buttons. Bass, mid, treble, and volume controls. Super tweek modification to EQ and find adjustment of balance. Professionally cleaned and serviced, all controls checked and OK.
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Tuner, Aux, CD, Phono, Mic inputs. Bass, Mid, and Treble EQ controls. Made minor modifications to make perfect level and EQ match between channels. New stock, QC'ed.
Phono Preamp - Solid State Stereo Pre-Amplifier, Small wall or cabinet mount box. Single Stere input/output device powered by AC line cord.
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RCA out, mic 1/4" stereo inputs, phono RCA in.
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Stereo Control Amplifier (preamp), black face, very simple layout, bass/treble, tone on/off, tuner/cd aux/tape 1/tape 2 inputs, tuner/cd/aux/tape 1/tape 2 REC out selectors, excellent condition, very clean, easy to use, 2 hairline scratches right hand corner
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MM & MC inputs, Simple slimline design using super low noise AD744 OP amp. about 6db of gain extra for MC. Audiophile grade components. Bench test QC, all OK. #9 condition
We have been selling and repairing professional and consumer audio equipment for over 40 years. (Read some of our customers testimonials here).
Tons of control, 8+ FM digital memory. Aux, CD, Tape 1/2 inputs. No phono inputs. Slim-line, black color (Adcom look), with remote. Excellent, #9 condition with box.
Super-quality hand wired boards, low noise, hi-accuracy controls, 7 bnd EQ, 8 AC sockets, 3-space rack mt - speaker add on cable for interfacing amp
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Stereo preamp, programmable tone settings, 2 rack space, re-enforced all ground connections on RCA jacks and cleaned and serviced, excellent condition
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Shure M64 stereo preamp. 2 channels, RCA ins/outs, equalization switch for phono, flat, or tape.
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Tube preamplifier, with a spare E88CC tube and garden hose style Essence AC cord. This unit has (4) JJ 6922 tubes from original design, and (2) 6DJ8 vintage (looks to be Mullard from Great Britain) installed in later stage for better harmonic distortion levels (about .1%). This unit is in #9+ condition!
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If you are having trouble finding parts, enter the name into our search bar at the top of the page. 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.
Phono Stereo preamp, with dip switches for cartridge impedance matching. Uses RCA in and professional screw terminals out. Unit can operate at AC 120 or 230 volt. Excellent #9 condition.
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Class A circuitry design pre-amp, very clean sounding unit, very good condition black one-sapce rack mount.
