Set the bass as high as you can att he volume level you want, and keep setting it higher until you get distortion, then bring it back down until it doesn'tdistort.

That will give you maximum bass.

I have mine set at -1 on my stereo as my 10" sub puts out the bass I want to hear and if I want it louder, I turn up the subwoofer volume level on its amplifier.

Alon

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'92 300CE - Sold
2004 C240 - 744 - C7 Wheels - Android Radio
2002 C320 - 816 - Sport Wagon - Sold
2006 E350 Wagon - 368 - Dead
2015 GL350 Bluetec - 197U