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      12-26-2015, 10:17 AM   #17
tracer bullet
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Drives: '11 135i , '15 X3 35i
Join Date: May 2011
Location: Saint Paul, MN

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I have the Logic 7 / HK in my car, and went through MusicarNW for a trunk mounted sub and an amp for it that also powered (and X'd over) the underseat mids. When setting my gains and X-over points I ran only the underseats without the trunk sub for a while, and I too noticed the difference in the additional power. Lower frequencies didn't just get louder overall, they really noticeably filled out. I have no regrets adding the sub but if I'd had a chance to audition just the additional power there without any other changes, if I'd have still felt a need to add a sub at all. Agreed, yeah, big difference w/ the additional power.
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