Yeah, I just sold a Quad 405/1 a few weeks ago, typical!!
Looks like a 606/909 140wpc,will fit the bill.
if u are patient u will get one at a non silly price..
A period correct amp is the Ampzilla,i believe the factory used one to test the DQ10s.
Phase linears or flame linears were also used...
As with dq10s,big amps are cheap in the good old U.s,a..
Can be unstable and a pig to repair..
As with dq10s,big amps are cheap in the good old U.s,a..