Preamplifier in WHITE! with MM/MC phono
All pre-owned product is tested in our service department and have been passed for sale... and comes with a 90 day warranty!
Our techs did a partial recap - pre driver board, relay board, and amplifier board all recapped and realigned, then bench tested perfect to specs.
Works and sounds great with tons of features! In very nice condition. (a few small scratches on the side panels) Includes manual.
Original box and packing are NOT included, but we will pack carefully. Specs are last image.
Yes, it's WHITE w/ yellow buttons :) Cool!
Dont let the price fool you - Back in the 80's/90's the original Adcom made some best sounding electronics available. Check out just how much technology is packed in here!
From the manual: The highly innovative internal design and circuit topologies of the GFP-565 transcend most presently known circuitry in
Reference Books and Engineering Application Notes and are certain to set new design and performance standards for products in its price range. Among the benefits provided by the GFP-565 are:
Very-low-impedance power supply to insure stable, accurate voltages regardless of circuit/current demands. This type of power supply design insures uncompressed dynamics identical to the source material.
Discrete solid-state regulators and the finest, lowest ESR bypass capacitors are used to maintain very-low-output impedance in the power supply.
All capacitors are state-of-the-art electrolytics and film capacitors for unsurpassed sonic purity. This design feature provides the lowest possible distortion of music signals.
DC supplies are distributed by heavy brass buses to insure lowest resistance between regulators and circuitry. This technique insures constant voltage to all the circuitry, regardless of volume or dynamic demands of the music.
High-current, all-mu-metal-shielded power transformer for best regulation under heavy demands. Eliminates stray hum fields for lowest noise (especially in phono). Provides undiminished voltage to circuits for best performance.
Signal-path amplifier stages use premium-grade I Cs selected for their linear operation and sonic quality. These linear amplifiers insure extremely low noise, low distortion and low DC offset for best performance with any of the preamp's outputs.
All stages are operated in pure Class-A mode using wide-bandwidth, high-current, low-impedance IC buffers in a unique circuit configuration designed to insure lowest distortion, regardless of volume demands, as well as zero dynamic-loading distortion.
Ultra-low-noise, Class-A phono preamplifier with high-current buffering and almost zero RIAA error, optimized for high-output moving-coil and moving-magnet cartridges. Its direct-coupled signal output provides maximum bass impact, maximum phase accuracy and perfect response to dynamics. These features result in the flattest, lowest-noise. lowest-distortion response from a high-grade phono cartridge and virtually faultless reproduction from any record.
Very-low-impedance RIAA equalization network. This unique network insures the lowest achievable noise in a phono preamp.
Entire signal path is direct-coupled from input to output when using BYPASS OUTPUT or MAIN OUTPUTS LAB.
Direct coupling minimizes the number of components signal must go through insuring no degradation of the music
signal.
Three sets of outputs: BYPASS OUTPUT is direct-coupled and placed before tone controls, filters. etc., and provides a signal in the most straightforward, simplest path; MAIN OUTPUTS LAB is also direct-coupled but permits operation of the tone controls, high filter, etc.; MAIN OUTPUTS NORMAL is capacitor-coupled using high-precision, high-grade, polycarbonate-film capacitors for virtually zero signal degradation.These outputs also permit operation of the tone controls and high filter.
Low output impedance (100 ohms) from amplifier outputs to reduce interaction of connecting cables and other loads, and preserve music dynamic contrasts. This low-impedance-output design ensures the full dynamic range of the signal will be preserved regardless of cable characteristics or amplifier load.
Low-impedance tape outputs (475 ohms) to perfectly interface with any type of tape recorder, including OAT. Insures the best recording characteristics, reducing interface effects of cables and the load impedance of the tape recorder inputs.
Buffered tape outputs to preserve input-source-signal integrity and preclude "loading" of the signal-source component and resultant distortion. Buffering prevents the degradation of the source signal caused by most tape recorders when connected to the tape outputs. These buffers insure that the integrity of the internal signal path will not be affected when a tape recorder is connected.
Front-panel-switchable processor loop. Shortens the signal path by switching the processor in and out of the circuit directly on the main circuit board. This feature allows the processor to be completely removed from the circuit when not needed to prevent any sonic degradation.
Highest-grade construction and parts including 1%, Roederstein metal-film resistors and all metallized-film, precision capacitors throughout. These components help achieve lower noise levels and lower signal degradation than preamps selling for many times the price of the GFP-565.
Direct switching of all functions on PC board. All working parts of the switches are soldered directly onto the actual
circuit traces eliminating long connecting wires between inputs/switches/circuitry/outputs.
Glass-epoxy-printed-circuit board, copper-plated on both sides, provides a ground plane to minimize noise and interference.
Highest-grade potentiometers for volume and balance controls to insure long-term accuracy and minimum "tracking error."
Non-permeable metal bottom plate to preclude the sonic degradation caused by eddy-currents and their magnetic fields when steel or other similar permeable metal parts are used in close proximity to circuitry, or the main printed-circuit board.
Improved headphone amplifier optimized for use with headphone impedances of 100 to 2,000 ohms.
