I recently got a jaycar 4 x 50rms amp Ive bridged two channals to get 160rms But im hardly getting any bass out of my sub (12" Alpine Bass VR). Ive set the amp to low pass and set the frequency control to 100 hertz/ But i seem to get more bass and sound when its set to high pass or full range. i have mucked around the with settins and cant seem to get anything.
The only thing i can think of is that i only have pre-outs on my head unit (no sub-out)