D DFW40 10+ year member CarAudio.com Veteran 2,082 6 Keller, TX DFW area Feb 15, 2006 #1 I usually use round ports and I use the 12volt.com to figure tuning. Can I just convert the port area from vented to round and vise versa or is there a different formula for slots since there is more surface area for the air to move over. Click to read more...
I usually use round ports and I use the 12volt.com to figure tuning. Can I just convert the port area from vented to round and vise versa or is there a different formula for slots since there is more surface area for the air to move over. Click to read more...
