During the 70's a company named Quatre made waves with the "Gain Cell" amplifier, which quickly acquired a reputation for blowing up. This was "bleeding edge" technology. The same company also made some speakers, of which I own a pair, called Quatra 8000 Series II. They are 10" 3-ways. The fronts are plastered with some type of tar, which looks most un-professional, but they actually sound decent. According to Orion the 8000s were made from 1972 to 1976 and retailed for $450.00. Curious if anyone here knows anything else about them.
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