Is there a way to plug up a multieffect let's say - BOSS GT8
into a Sony STR-DB940 reciever?

It's just that i'm sick of my 15w amp, sounds like **** and on the other hand I have the Sony reciever + 5 monsterous Boston Acoustics speakers and a Boston Sub...

If it is doable...how the hell do i do that?

BTW, any recommendations for a multieffect cheaper than the GT8?

Thnx a lot!
Ive done it before but it wont sound any better than your little amp. Its just a preamp signal and stereos are made to be tone neutral on whats fed into them. A guitar amp is made to affect the preamp sound. So yea it should work but will still sound like crap. Time for a better amp.