My Port Question

[SQCherokee]

I have a Q logic enclosure for a car that I am planing on modifying and turing around to sell.

It is 1.25 cuft with a single port. The port is 4" internal diameter, and 11" long

What frequency is this tuned to?

The port is made of a cardboard tube...I plan to change that to a PVC pipe...I want to tune this enclosure as low as possible...so should I use an elbow and another tube to extend it or drill another hole in the top and add a second port?

Just so you know its a hatcback box (picture a triangle shape thats flat across the top) its about 16" high x 17" wide x 9" top depth x 15" bottom depth

[Mike P.]

The box is tuned to 44 hz. Extending the port to 36 inches long would tune the box to 30 hz.

[SQCherokee]

wow...so to do that I would have to make it into a u shape...will that hurt performance of the port to do that?

[Mike P.]

As long as the bends are smooth there won't be a problem. See post #9 in this build thread for an example.

http://www.hometheatershack.com/foru...-im-again.html