Does the NAD receiver have pre-outs? If not then you can't use the 2100. If you can use the 2100, I suspect it will drive the Klipsch speakers to crazy levels.
You can use the NAD 2100 w/o a pre-amp/processor by hooking it up in lab mode. You can connect a cd player to it and use the gain controls on the amp to control the volume.
How many watts is this amp and also my uncle has 2 Klipsch floorstanding speakers, and they sound like (10) speakers. there rear ported, single 8inch drivers, mid, and high. website sells them(discontinued) for like $3000. whats up? what goes into these.
I just joined (first post) and am glad to see that there are people like ya'll around. I'll have some questions later, but for now I have some input on this thread. Adcom used to make a good "speaker out to preamp in" adaptor for just this situation. I think there may some other garbage ones out there too, but if you can't get an Adcom new (ran about $50 in the mid 80s), maybe there is one on e-Bay or somewhere you can get one.
Thank you all for your comments/help. Both needed some minor repair. Thanks to all your advice I ultimately bagged the bridging idea and went w/ the 4225 as a pre and the 2100 as a the amp.
The Klipsch 5.5s are 100 watts maximum continuous (500 watts peak)
The system sounds great through out the range I have tried. Although I have not even cranked it up more than 50% I'm afraid I'll break windows!