This was a special purchase and not regularly available.
This all original monster 400 watt amplifier is not only collectible but very rare.
MOS-FET 400E Modifications done back in 1990 by Audio by Van Alstine
All lamps and meters work, very clean inside and out. No dents, dings or scratches.
(there is some sort of number inscribed into the back of the heatsink, possibly for theft recovery purposes )
The modifications include Van Alstine's custom circuit boards, modified power supply and the removal of several functions including disabling the Dynaguard and disabling the filter push buttons. The amp uses the legendary Hitachi output transistors and many other high end parts.