I want to hook up 4 speakers to my Yamaha R-xv 420 receiver, which setup would give nme more power? Option 1: Running all 4 speakers from the 2 main A channels @ 4 ohms. Option 2: Running 1 pair of speakers from the A main channels and a second set from the B Channels @ 8 ohms.
Instead of building an active xover why not just buy an adjustable active xover like something from Behringer or a cheap car xover with a wall wart for a power supply? That way you will be able to adjust xover points n the fly.
I have a pair of SR 80’s and they really show how bad some music is recorded. Some songs I used to listen too all the time I have to skip because the sound so bad with these headphones. If you get a good pair of headphones make sure you have good source material to go with it.
http://www.surcode.com/ does it automatically and there is a trial ver in adobe remier pro. Steinberg's Nuendo lets you place tracks in the left, right, center, rear channels. There are some more out there but thats a start.