Alright, I dunno how to explain this but the best way is to say my port whistles. It doesn't bother me because I can't hear it unless I play test tones around 20-35 but I am just wondering why it does this or if all ported boxes do this? I am guessing it has something to do with the resonance of the port (I learned a little bit about that in science class). I could be totally wrong but I was just wondering if any one could educate me on this subject.

Thankx guys.

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Vehicle: 2004 Chevy Aveo Hatchback
Battery: Stinger
Wire: W.S. 0 Guage (ground/power strait to battery)
Head Unit: Eclipse CD3000
Speaker Amp: Infinity Reference 7521a
Subwoofer Amplifier: Infinity Reference 1211a
Speakers: Kicker Titanium 5.25"
Subwoofer: Image Dynamics IDQ 15"