Pyle 4 Channel Speaker Selector

I have a 5.1 system inside and 2 speakers outside. This is a 4 speaker pair setup which you would think is perfect... well no... only has 2 inputs. So this means front speakers on one channel, 2 inside and 2 outside (Button A). Surround on #3 channel (Button B.) Boom... done. BUT... have sub woofer and center channel so need to unplug subwoofer and ensure that center channel is not on. Had to buy remote transmitter/receiver for outside sub. It works good. I do not believe sound quality has been compromised. I cannot hear any difference when I have everything turned on vs. just inside or just outside. This would be perfect for 2 channel systems with 1 amp or 2 amps or 4 channel system and 1 amp. I could not find a 5.1 system for under a ton and 1/2 of money!