Frequency tunning.

[perpetual]

How do I know at what frequency my sub is tuned to?

Here's what I did:

I ran tests in my sub from 10Hz to 20Hz, because I think that my sub is tunned around those frequencies.

From 10Hz to 13Hz, there was a decent amount of air coming out of the port (like a fan with three settings in the middle position), and the driver's excursion was a lot.

From 14Hz to 17Hz, there was a lot of air coming out of the port (like a fan with three settings in the max postion), and the driver's excursion was a lot also.

From 18Hz to 20Hz, there was a decent amount of air coming out of the port (like a fan with three settings in the middle position) , and the driver's excursion was minimal.

From 25Hz and up, there was almost no air coming out of the port, and the drivers excursion was normal.

[DcibeL]

The speaker should have the least excursion at the tuning frequency. It is hard to tell this from just looking at it and playing with a function generator. If it is a commercial product, look it up on the net, and you may find your answer.

The question arises, why does it matter?

[perpetual]

I got the answer. I just wanted to know the real tunning frequency of my sub and its capabilities. Also in case I need a subsonic filter.

Thanks.