06saturnion Posted December 25, 2010 Report Posted December 25, 2010 I have two DD 1515 with a DD M2. The box i have right now is 8 cubic feet tuned at 40 Hertz. The problem I am having is that I hit the highs with no problem at all, but when it comes to the lows I'm not hitting where i want them to. When i opening my trunk the subs hit s the lows fine but as soon as i close the trunk the lows disappear. Anyone with ideas please let me know i have tried fine tuning the amp.
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