"Bret Ludwig" said:
The Quads were brilliantly designed but poorly implemented. Modified
upgraded ones sound extremely good and a homebrew variant would be my
choice to build a homemade solid state amp. The current dumping circuit
worked really well. When combined with the Mc Power Goose circuit
(patent expired) and a butch power supply they should be a very fine
amp indeed.
http://quad405.com/
A certain Bernd Ludwig (popular name, that) modified the 405, and
successfully, it seems.
--
"Due knot trussed yore spell chequer two fined awl miss steaks."