Posted August 20, 201114 yr I have a 95 caddi deville, and i would like help in building a ported SQ sub box for two Dcon 12D4's. they will be powerd by a RF power T500-1 dbcp 2010 model. My bass gets trapped in the trunk,so i cut two 4" round holes in the rear deck to let sound inside the car. will the 4" holes change the tuning of a ported box? All help welcom. thanks
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