OTL Amps and ProAc Speakers

Thanks a lot you guys for all the great info! I am looking forward to entering the OTL space...should be fun.

Jcbtubes...Thanks for letting me know about the gain on the GM20. I would be running a Wadia 860X directly to the GM20 and would assume that I would be okay since the gain can be set appropriately inside the Wadia. Do you have any experience running your GM20 in this type of config? Thanks again...John