I posted this earlier in the electronics section, but figured this was probably the more applicable area to post this question. I'm a longtime lurker, but new poster. I have been really enjoying the wealth of knowledge I have read here on this board. I am picking up a set of RTi12s tomorrow to use as my front speakers in an home theater setup. These will replace my current set of RTi10s which I am going to move to my sorround speakers, and use a set of RTi8s for back sorrounds (I'm also using a CSi5 as my center and have two subs, a Klipsch Sub-12 and a Polk DSW pro 500). I am currently using an Onkyo 806 as my reciever. Needless to say, with this set-up, I think I'm going to need an external amp to really get the most out of the speakers. I have narrowed my choice for amps to either the Emotiva UPA-7 (125w x 7), or MPS-2 (200x7).
My question is this, when I hook up either one of these amps to my Onkyo 806 and use the reciever as a preamp, can I still use the recievers amplifeier and bi-amp my speakers? In other words when you hook up an amp to the reciever, does the recievers amplifier still output wattage via the speaker terminals, or does the recievers amplifier section shut off when you connect the reciever to an amp? If the reciever's amplifier will still work when connected to an external amplifier, I am thinking of buying the Emotiva UPA-7 for about $650, and bi-amping my speakers using both the reciever and the UPA-7. If this does not work, than I'll have to pony up for the MPS-2, which will give me more power, but will cost about $1700 new. Obviously I would like to go the reciever plus UPA-7 route if possible. Are there any problems with this set-up? What do y'all think? Thanks in advance for your help!