Need help with a Alpine PSW-8

I put in a Alpine PSW-8, blog with a Alpine KTP-44A and a i207-WRA.

The issues with the PSW8 is, I have the gain set all the way up and bass and its not really sounding that great. Bass/lows are only there when I am cranking it or bass heavy music. I tired a KICKER HS8 and got NO sound via RCAs. At least with he PSW-8 it works. Alpine is not help and does not think I have a 3rd bad radio.

The bass remote is also all the way up. Alpine said no need to have gain on sub set that high.

Before this I has a 430 with a AudioControl LC2i, Alpine KTP-U and kicker HS8. The system worked excellent and sound was great. That sub would shake my Jeep at times and kick drums could be felt and heard on my music.

I am using the same power and grounding points.