tying in yamaharxv-665w/adcomgfa555as 2 channel

Are you saying you used the multichannel outs not the zone two outs and you had no volume adjustment?

not exactly, when h/u from adcom to preout of yamaha Ihad no control of anything. the guy who wants me to ty into the fronts is off the mark. I wanted to keep h/t totally
seperate from my new 2channel speakers. Again Yamaha was no help and just said you need a pre-amp to work the infinitys. this is not what I was originally told. Anyway I did get an onkyopre-amp for $20 so all in all it wasn't that bad. Now Ihave h/t w/ my small Klipschs and 2 channel w/ the adcom -onkyo-infinitys. That's the only way I did it.If someone would walk me through another way I'll listen

If you are using zone 2 then it makes sense you will need a preamp. But if you use the multichannel outs you should not need a pre. For the latter you would just use the front channels and set the receiver for stereo mode when using the Adcom. Of course using zone 2 is better most of the time if you now have a preamp.

zone2 is totally out of the picture now . what you want me to do is disconnect my klipsch fronts and put the infinitys there instead and then what do I DO w/ the klipscs' but them on zone 2. that would be ok if we were talking 2 seperate rooms but no and both systems are in my main living room. I know your trying to help and I still think there's a way to get the yamaha to perform like a pre-amp.

To use the Yamaha as a preamp all you have to do is connect the Adcom to the front left and right outputs of the multi-channel outs. When you don't want to use the Adcom simply turn it off and you can still use the Yamaha surround system normally. It works this way on my girlfriend's 667 and should be the same on the 665. Yamaha has been operating the same way for some time.