LPF = Low Pass Filter, if u are going to use it for sub, use this
HPF = high pass filter, if youre goin to use it for speakers
Flat = if u want to use full range, like for 2 way coaxials
When BMW engineers took a much-needed break from the 128-degree F weather in Death Valley, they were kind enough to unlatch the hatch of the new X6 for KPG's spies to...