connecting mono amps to pre amp

yes, I actually have two tube amps that are paired up with a mac c 26 that are bi-amping a set of paradigms. sounds really good.  Just looking at some options with the ma 6100 and the two 2120's. as mentioned in my user name I have some other pieces, sound craftsmen, nikko, marantz, kenwood. and a couple of pioneer spec pieces, still looking for a couple of other spec pieces to finish up that rack of stuff,  My wife thinks I'm NUTS!!!  buat as I told her I'm home more often since the Harley, and vette are gone. anyway, i really enjot the 2 channel stuff! 

i have a question regarding the 6100 mode switch, it says Mono (L+R) as opposed to a true mono that would only play one channel (the same channel) thru both correct??

The Mono(L+R) position of the switch will send the sum of the signals for the two channels (which is normally what is considered to constitute a "true mono" signal) into both speakers.  But as can be seen in this photo it appears that other positions of the switch (the two left-most positions) are available that would play one channel through both speakers.

Regards,
-- Al
   

Ok, so now that I'm confused as hell........ should the selector switch on the 6100 be left in the stereo position, when using both of the 2120's? or should it be in the "MONO (L+R) position??

Ok, So according to Al, unless I'm listening to a MONO recording, the 6100 selector switch should be left in the STEREO position even with BOTH 2120's connected.  Thanks Again!