A500 amp (rear, close-up)

switch on left/bottom is for bridging the 2 channels into 1.

 

really insane people are known to convert a 250watt/ch amp into a single 500w mono'block' amp. of course you need two amps for stereo.

 

I don't plan to run in 'bridged' mode but its nice to know its already built into the unit.

 

Done