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GRANITE AUDIO is a system concept. A system with true synergy.
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Press Reviews Of Granite Audio Systems at CES
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Jonathan "J-10" Scull, Contributing Writer Gramophone February 1999 "US Audio News" "Granite Audio tubes"
Granite Audio's full line of tubed preamplifiers, power amplifiers, and loudspeakers are encased in an attractive artificial granite material which is said to offer a high degree of resonance damping. The Model 770 preamplifier makes use of six 12AX7 tubes and one 6X4 rectifier to avoid, according to Granite, the tendency of solid-state rectification to add noise and spikes to the voltage rail.
The all-tube phono section covers MM cartridges and offers variable load to 100K ohms. A four-layer printed circuit board (pcb) is employed, two layers of which carry the high-voltage anode and high-current filament feeds. The signal-carrying layers are set apart as much as possible, crossing at right angles when required. The result is very low noise and crosstalk.
The 770 preamplifier employs audiophile grade components from Vishay, Alps, Sprague, Alcoswitch, Electroswitch, and Holco, all mounted directly on the PCB. The power supply is on a separate board to eliminate potential ground loop problems. The filament supply is filtered and rectified with low-noise Schottky rectifiers to produce a smooth voltage rail. Switches and contacts are either gold or silver and the RCA inputs are hard gold-plated over silver over copper. The 770 preamplifier has dual outputs for easy bi-amping, with one phono and four line-level inputs plus a tape loop.
The artificial granite finish, said to be 2-4 times denser than typical MDF, comes in six standard colors with customized hues available.
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Granite Audio - Vacuum tube amps, preamps, speaker cables, AC power cords, CD players, granite speakers, amplifiers, tubes, silver interconnect cables, stereo.
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