Thanks for the input guys it just seemed a little odd to have all those speakers and not be able to turn them all on on some decoder . My old one is rx-v3000 bought this from a salon left over stock its quite the machine sounds good withe my carvers ,was going to put it in a smaller setup but its to nice not to use in my main room Thanks again
I agree, it is odd that Yamaha did not make it so that both could be used at the same time. Even though I can see them not wanting to put in two more channels of amplification, they could have had preamp outputs for using a stereo power amplifier for the other channels. Since they did not do that (and did many other receivers the same way in this regard), my guess is that there is some limitation in the processing chip that they used in that model, such that the chip can handle only 7.1 channels at a time, not the 9.1 that would be required for all to be engaged at once.
In many respects, though, the RX-V2700 is a fine receiver; here you can read a review of it:
http://www.audioholics.com/reviews/receivers/yamaha-rx-v2700-receiver-review
And it is also a receiver with which I am personally familiar, as I use one in my home theater system. I have no plans on upgrading it ever, as I do not require one that passes 3D and my BD (Blu-ray) player decodes the new formats and passes them as multichannel PCM via HDMI to the receiver, so I have that covered.
I have never tried the presence channels, as I am renting and would have trouble physically putting in the presence channel speakers.