trjohnst Posted May 14, 2011 Report Share Posted May 14, 2011 I am trying to extend my ports in hope to make my box more efficient and have more DB's. I current have 2 4inch diameter 9.4inch long ports and am about to use a 90 degree adapter, and add 12 more inches on each tube, 4inchs ID. I dont know if 12" is too long or not. My box is 4.77 ft^3 in volume and will be using a HDC3 15 from Audioque and 2 JL 500/1 amps. If anyone has any suggestions on how long I should make my extention, let me know. 1991 Accord Audioque HDC3 15" (Copper)<--Sub Audioque HDC3 15" (Copper)<--Backup Sub Crescendo BC2000D<--Amp Big 3 1/0 Knu<--Wiring Eonon 3.5" DVD<--Headunit Infinity Kappa Perfect<--Mids & Highs 2nd Stock 80Amp alt. 1991 Mustang 5.0 Too many mods (Sold) 1991 240sx SR20 Red Top Too many mods (Sold) 2004 GTO Just starting mods Link to comment Share on other sites More sharing options...
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