by using my HU it sends all freq to my speakers which sound like shit, so i have to boost treble and decrease bass on the EQ but then its extremely trebly, and no mids or low mids if that makes sense. and obv the lowsss my sub has. but with a cheap 4 channel, though i only sending the same power, they wont be getting the lows which is whats makng them sound terrible.....its a temp thing