2 Stereo amps to be used in Mono...hookup?

@elizabeth 



Speakers are 8ohm.

@georgehifi 



I am not in possesion of 2 amps but may have an opportunity to land a second one for a friend or perhaps keep for myself if to bridge...given yours and Elizabeth's post I will pass on bridging.  I am really satisfied with my sound.   If I looked at my components I should probably if anything consider my delivery of music...I am a streamer using Bluetooth.....rblink Arcam....should go network..or ethernet cable....
If I had the A400's which are bi ampable I would consider for sure your passive diagram sent. I have a screenshot saved.

Thank you.

Yeah, thanks George and Elizabeth  ;)

Soundcraftsman used to make an external bridging circuit called the “auto Bridge”.  It would do what your asking if the amps are stable.  Remember if bridged the resistance drops by a factor of 2 and your amps better have high dampening factor for it to work well and not color the sound too much.    It will  color the sound though.