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APRIL 23RD SPRINGFIELD ILLINOIS USACI SANCTIONED SOUND EVENT. FOOD, DRINKS VENDORS AND SWAP MEET 2323 N. 5TH CORNER OF 5TH AND BROWNING. FOR INFO VISIT http://www.facebook.com/#!/event.php?eid=195511017147170 FOR MORE INFO

VISIT WWW.THE12VOLT.COM FIND SUB ENCLOSURE CALCULATOR. IT IS AS SIMPLE AS ENTER DIMENSIONS FOR YOUR VEHICLE. 2 18'S SHOULD RUN 4 CUBES PER SUB PORTED. TUNE IT TO ABOUT 30-32 HZ. AND ABOUT 150 SQUARE INCHES OF PORT. THAT SITE ALSO HAS PORT CALCULATOR.