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View Full Version : Box help fpr Alpine SWR 1521D



john64
12-18-2006, 08:47 AM
Hey guys, I just finished a nice sealed enclosure for my Alpine SWR 1521D, I have it wired to 4 ohms on my Alpine MRV 1507 (bridged). The enclosure turned out to be around 2.8 cubes after all displacement. It sounds real nice, but I would love to see what it can do ported. What would your recommendations be for port size and length? I would like to do 2 ports. The sub is facing the rear, but the ports would have to face the passengers. Your input is welcome.
http://memimage.cardomain.net/member_images/4/web/448000-448999/448049_335_full.jpg
http://memimage.cardomain.net/member_images/4/web/448000-448999/448049_334_full.jpg

Car is an 85 RX7 :naughty:
Sub specs are:
Fs:23hz
Vas:98L
Qms:9.84
Qes:.4
Qts:.38
X max:16.5mm
X peak: 33mm

Pickler
12-18-2006, 09:04 AM
That box looks really nice.