Adcom Gfp 750 // Solid-State Preamp / Orig. Box & Remote

SOLD , now part of a Private Collection

On any list of "sleeper preamps," this one would have to land near the top. Adcom name, designed by Nelson Pass.

Production
1999
Condition
9/10
Serial No.
P751DB03075
Restoration
  • Full 30-point service check
  • Cleaned controls, switches, and chassis
Factory Specs

Type   Solid-state preamplifier

Frequency response   20Hz to 20kHz

Total harmonic distortion   0.017%

Input sensitivity   365mV (line)

Signal to noise ratio   102dB (line)

Output   1V (Pre out)

Dimensions   17"W x 4.25"H x 12"D

Weight   15 lbs.

Documentation

Adcom GFP 750 Owner's Manual

Liner Notes

The GFP-750 is a Nelson Pass design—essentially a variation on the Pass Labs Aleph P and Pass's DIY project, The Son of the Bride of Zen. The circuit couldn't be simpler. Says Pass, "It's a differential pair—the end. A single gain stage, balanced input, balanced output, no feedback....We took a pair of MOSFETs, and the inputs go to the gates of the MOSFETs. The MOSFET sources are tied together and biased with a current source, with the signal taken off the drains. [The circuit] can run unbalanced on either side, although the performance is best when it's run balanced."

Stereophile, Mar '99

Stock No.
7601885642973

On any list of "sleeper preamps," this one would have to land near the top. Adcom name, designed by Nelson Pass.



Production

1999

Condition

9/10

Serial No.

P751DB03075

Restoration

  • Full 30-point service check
  • Cleaned controls, switches, and chassis

Factory Specs

Type   Solid-state preamplifier

Frequency response   20Hz to 20kHz

Total harmonic distortion   0.017%

Input sensitivity   365mV (line)

Signal to noise ratio   102dB (line)

Output   1V (Pre out)

Dimensions   17"W x 4.25"H x 12"D

Weight   15 lbs.

Documentation

Adcom GFP 750 Owner's Manual

Liner Notes

The GFP-750 is a Nelson Pass design—essentially a variation on the Pass Labs Aleph P and Pass's DIY project, The Son of the Bride of Zen. The circuit couldn't be simpler. Says Pass, "It's a differential pair—the end. A single gain stage, balanced input, balanced output, no feedback....We took a pair of MOSFETs, and the inputs go to the gates of the MOSFETs. The MOSFET sources are tied together and biased with a current source, with the signal taken off the drains. [The circuit] can run unbalanced on either side, although the performance is best when it's run balanced."

Stereophile, Mar '99

Stock No.

7601885642973

Adcom GFP 750 // Solid-State Preamp / Orig. Box & Remote
Adcom GFP 750 // Solid-State Preamp / Orig. Box & Remote
Adcom GFP 750 // Solid-State Preamp / Orig. Box & Remote
Adcom GFP 750 // Solid-State Preamp / Orig. Box & Remote
Adcom GFP 750 // Solid-State Preamp / Orig. Box & Remote
Adcom GFP 750 // Solid-State Preamp / Orig. Box & Remote
Adcom GFP 750 // Solid-State Preamp / Orig. Box & Remote
Adcom GFP 750 // Solid-State Preamp / Orig. Box & Remote
Adcom GFP 750 // Solid-State Preamp / Orig. Box & Remote
Adcom GFP 750 // Solid-State Preamp / Orig. Box & Remote
Adcom GFP 750 // Solid-State Preamp / Orig. Box & Remote

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