NAD M3 Master Series Amp

I'm using a M3 in my home system as a 2ch. amp for critical music listening. I use the same L&R speakers also in a Home Theater setup using a Onkyo Receiver. Unfortunately I have to switch speaker wires each time I decide to listen to stereo music or watch movies because the sound from the Receiver on 2ch music is not that great, even bi-amped.

The M3 does not have a HT bypass. I've heard there is a simple way to upgrade this amp for bypass but I can't find any information on where or how to do it. Anyone have any information?

Thanks in advance,

steve