Hey guys I have a couple questions. I did a build on 2- SA-12" V.2 Nightshade and I had a custom box built that is 3.0 cf box w/ a port face that is 40x1.2" and is 23" long (specs I got from SA). The subs are firing up and the port is firing back at the bottom of the box. This roughly give me 48 inches of port tuned at 36 hrz, I heard from SA tech that I needed 15 inches of port for each SQ FT. It sounds great, the only problem is it doesn't sound as loud as my ProBox super bass box did. Any suggestions? I talked with SA tech again and they said raise the tuning frequency by cutting off a little off of the port. I checked with ProBox and the Super Bass Boxes are tuned at 45 hrz. It sounds a lot cleaner this way with the custom box but still not as loud as I am looking for. I am running the subs at 1 ohm each and they are being powered by 2 Memphis MoJo 2500.1 each at 1 ohm. I have two Kinetik 2400 backing up the amps, big three is done as well 1/0 Gauge Wiring etc. This is in a Dodge Durango. Any help would be greatly appreciated!

Curtis, GP Customs

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Edited November 9, 201113 yr by gp customs

No such thing as a SA-12" V.2 Nightshade!

The higher tuning gives you more output on the top end but also makes the frequency response "peaky", that's why the lower tuning enclosure sounds better to you but doesn't have as much output on the top end.

You could try building a larger enclosure for increased efficiency, or use more drivers.

What stefan said. The probox = loud as shit on 1 playlist while the custom box is gonna you more of a clean overall sound that plays a lot more music.