does output quality change when amp bridged?

the ss mac stuff bridges just fine.....the tube macs lose a bit of sweetness

ive owned & ran the mc2102 in bridged mono & it sounded great,everything doubles in bridged mono,like wattage & distortion but doubling 0.005% distortion isnt going to give you any noticable difference in sound quality.

IMO amps that give up the goat when ran in bridged mono are poorly designed to begin with,the mc2102 is perfect for running in bridged mono with no ill affects in sound or performance.

Doesn't impedance requirement of the speakers also increase? When I was using an NAD multi-channel bridgeable amp for home theater, I seem to recall that in the bridged mode, speakers with a minimum of 8 ohm impedance were required.

The amp does see a halving of the impedence when bridged, so if the amp isn't stable into half of the speakers impedence rating, you can have problems with the amp...especially when pushed hard. However, if your amp is stable into a 2 or 3 ohm load, you are likely good to go.

Also...damping factor is reduced.

Dave