SOLD - DEALER AD: Robert Grodinsky Research ( RGR ) Model Four-1HG Preamplifier
Item #649375031Info: Robert Grodinsky Research ( RGR ) Model Four-1HG Preamplifier
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||55.88cm x 40.64cm x 15.24cm
||7 - Good (?)
Aug 25, 17 3:01pm (PST)
Edited: Aug 26, 17 10:45am
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This is the Robert Grodinsky Research (RGR) Model Four-1HG preamplifier that was rated so well by the Audio Critic and it was the source of much discussion in several issues of The Absolute Sound during the mid 1980's.
This is a full function preamp with 2 phono inputs which can be set for MM or MC cartridges, defeatable filters and tone controls. This is a cult classic preamplifier cited for its wide soundstage and its excellent phono stage. It is in very good condition and has been fully upgraded internally with new capacitors, connections resoldered and switches and contacts cleaned.
Manufacturer: Robert Grodinsky Research, USA
Inputs: 2 x Phono MM or MC: (47k, 1k, 100 ohms),
2 x Aux, 2 x Tape Monitor
Tape record outputs: 2 x 2 RCA
Phono equalization: RIAA +,- 0.1 dB
Rated output voltage: 2 V
THD (1 kHz): 0.005%
Power bandwidth: 0.5 Hz to 300 kHz
Frequency response: 20 Hz to 20 kHz (+,- 0.05 dB)
Noise ratio: Phono MM/MC: -80dB
Outputs: Pre Outs 2 pair RCA
Tone controls: Bass at 20 Hz: +,- 12 dB,
Treble at 15 kHz: +,- 12 dB
Tone Control Bypass switch.
Switchable sub sonic filter.
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