My front system Rainbow SLX 265 Deluxe and my Sub Audio System Radion 12BR hang on the Carpower Wanted 4/320. The bass from the subwoofer is great, unfortunately there is almost no kickbass at the front. Tonal the system is already good, but with high levels it gets a little shrill and distorted. Now I was told that the Wanted is not a “sound amp” and e.g. the Xetec is better for lengths. My question(s): 1. Does the Wanted not excite my components tonalally or can you get more out of it? 2. I Would another level bring tangible improvements? If so, which? 4. Would you operate the Rainbow and the AS Sub on a 4-channel (like me) or on a 4-channel and 2-channel?