[Manolo]

Hi: Looking at an innards photo of this monoblock I guess it would be easy to do.... because this monaural mode is a bridge of the two channels, isn't it.

Something connecting the two channel sections must be disconnected and an input and output connection to the other channel would have to be restored, am I right? Thanks!

[MonsterJeeping]

I think klaus does it for free if you buy a second amp from him.  good time to have him set the bias as well.