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Phase Linear History
StereoManuals - StereoManuals is owned and operated by Rick Stout. We are hosting the sub-domains show here and intend to keep them up for the benefit of the audio community. Please visit our main site for a huge selection of very high quality audio (and other) manuals, articles, customer system pages and more. We also sponsor two audio discussion groups to assist the audio community. Vintage Technics Database - We host the former www.vintagetechnics.com site since it's domain expired. It has been recoded for better speed and is being updated. Phase Linear History Reference Site -  Anthony Young is a friend and the author the former www.phaselinearhistory.com web site. He lost ownership of the domain name and his original files. With his blessing, we have resurrected the site. Anthony has authored other excellent Reference Sites. StereoManuals has Phase Linear Service Manuals and other literature for most of the popular models. If you do not support us via manuals purchases, please consider making a small donation to help with expenses regarding the Phase Linear History pages.
   
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Phase Linear Pre-Amplifiers  
   
2000 Series   3000 Series   4000 Series
Phase Linear 4000 Series Pre-Amplifiers



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.

 

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.

 

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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