Originally posted by JLeurck I've got one of these but mine came w/5881s. The manual says it will take either but you need to reset the bias or you will damage the amp (there are bias trim pots for each stereo side - it says set the bias for 50 milliamps no matter which tube is used).
As for the bridged mono thing, the min load it can take is 8 Ohms. Set each side for 4 Ohms for an 8 Ohm mono load, each side to 8 Ohms for a 16 Ohm mono load. No provision for a 4 Ohm mono load.
Wow thats alot are you sure, i just got new 6l6's for mine, it was biased at 32milliamps, i set it to 35 with the new quad. It sounds good at 35 but if the manual says to set the 6l6 version to 50 i might try that.