View Full Version : got two single ported boxes for 15's

06-08-2013, 10:29 PM
based on dimensions, we're talking 69L with port dimensions of 2.6in wide, 15in tall, 14.5in deep.

winISD shows for a 69L box not including the port, the port comes out to be tuned to 45hz:crazy:

winISD show a massive peak at 65hz of like 5-6db

My question is, does the sub start to unload under the peak of 65hz or still under the tuning frequency of 45hz?

I think I got the subsonic filter at about 30hz.

06-10-2013, 10:30 PM
under the tuning freq afaik

06-11-2013, 12:30 AM
I have each sub facing away from each other in the trunk. They are facing right and left.

They don't seem as loud as my old sealed box setup where both subs faced the trunk lid/wall. It seems like I'm getting some cancellation, but I don't know exactly why. The subs are in phase too. Is it because they are facing the sides or because the cones and ports are about 1 foot away from the trunks side walls?