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The 4000 Autocorrelation Preamplifier
was a collaboration design by Bob Carver and Bill Skinner. It was
designed to expand or uncompress the sonics of recorded material. In audio parlance, it is called dynamic headroom. In the midst of
all the knobs and toggles was the four channel balance joystick.
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The 4000 had the capability of
controlling up to six components: a tuner, two tape decks, two
turntables and an auxilliary. It had three switched and three unswitched AC plugs. The 4000 was manufactured from 1973 to 1977. It retailed for $600 but the price rose ten percent in 1977. It is
still highly sought after today.
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The 4000 Series Two
Preamplifier appeared in 1978. It continued the Phase Linear
legacy of extensive control of source material. It featured
improved specifications over the 4000. Those specs were
overshadowed, however, by the 3300 and 3500 preamps, which made the 4000
Series Two difficult to sell. Phase Linear was forced to
dramatically lower the price from $700 in 1980 to $425 in 1981 and 1982. |
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