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Message: <blockquote data-quote="amartin_72" data-source="post: 1389510" data-attributes="member: 564679"><p>A 4 inch port is only giving you 12 square inches of port area. You should try using two, or idealy three of those ports instead of one. They will need to be a new length it might not fit in your box. I have had my 1242d type  -r's in alot of different boxes. My first one was 1.75ft each chamber @32hz with three 2" ports per chamber - thats only 9 square inches of port per sub. Then i built a box for one of them at 2.2ft@34hz with 32 inches of port area and it was almost as loud as the previos setup with the small ports. Redesigning your box for more port area will get you some huge gains over your sealed setup.</p></blockquote><p></p>

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