Yes,Yes and he.s nuts.
4 responses Add your response
As far as using different amps, yes you can, however you will encounter a balance problem beyond simply calibrating the system with a sound meter as Kthomas has suggested. You will find that yes, that can easily be done, but the volumes of the different speakers, and especially when they are different speakers and amps, will vary with input volume. In other words, it might be perfect @ 80dB, but the fronts might be louder at higher volumes and the rears louder at lower volumes or vice versa.
Having gone through several different combinations of speakers and amps, this ultimately led me to use all the same amps, and all similar speakers to keep the balance in check at the various volumes.
...just one more thing, some people might be inclined to blow this difference off, but it IS VERY SIGNIFICANT in HT as the dynamic range can be huge......
Just my .02.
It’s all simply boils down to your priorities.
If you just want to add decent 5/7 ch. Just buy a nice receiver with 5 or 7 speakers package.
All together will cost you less than prepro you are planning to buy.
I really don’t think than you need more for your 38” TV
If you want really good HT integrated system, most modern processors in that range have very sophisticated calibrating capabilities . (BTW, I would add EAD to that list).
However, in serious HT setup it’s a good idea to have matching speakers / amplification on front 3 channel.