How high does anyone adjust the bass on the stereos in their bass?

I have a w126 with 6x9 speakers in the back and the bass I keep pretty much high. I dont like bass that would rock the whole car, but maybe the same level of bass a w140 has. I remember though, getting a ride home from school in my freind's dads w140 and he put some techno music on and cranked it. WOW, what sound!

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