Sorry. I am getting ALMOST no sound from the sub. What's coming through is the music. It's just very faint.
-I have tried adjusting the gain and have tried it with the low pass filter both on and off.
-I can hear the subwoofer from the driver's seat with the subwoofer controls on the head unit as loud as possible but what I hear then is a weak, lame sounding thump that was slightly out of phase with the rest of the music.
-The JL Audio website has a very specific blueprint with materials and dimensions for the box they recommend for this sub so I made it myself.
-If an additional amp is the answer, I will get one that will give it as close to 300w as possible.
-The sub is new.
Thanks. I really appreciate all this help.