can I remove some amps from my setup?
 

2 pair Polk coax in boats, 1 pair Polk coax bow, xs-12, pair pro 80's. Current amp setup is rear polks on clarion 4 ch, bow on clarion 2 ch, sub on jl m1400. Plan to run sub off ch. 5&6 on syn amp and remove jl amp. Would it cost me more to remove the 2 ch and rewire in boats all to four ch than it would be to leave the 2 ch? As opposed to selling the 2 ch.