I am using my iSonic with a 20" Toshiba tv and there is a voice sync problem which causes it to sound like an echo unless I turn the tv volume off altogether. When I hook up my Bose Wave there is no similar problem, so it's just with the Polk. Using both volumes sounds better than just with the iSonic alone.
With my major surround sound system which uses Outlaw components, there is a voice sync adjustment for this problem.
Is there any known fix for improving the voice sync with the iSonic and a TV?