AVS Forum Addicted Member
Join Date: Apr 1999
Location: Mountain View, CA USA
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I must say I can understand diy's frustration.
I think this thread has gone 'round and 'round because of the dozens of comments on port compression, when the simulations have shown, and not been refuted that I can see, that there won't be any, except maybe with a track or two, like F'in Irene which I believe has some strong 5 Hz rotor blade noise.
It's also been pointed though that such a small port can't add significant useful output, and this is borne out by the simulations as well, which show an increase of a couple of dB.
Going off on a tangent, sort of, many times I've puzzled over why is that a couple of dB is not a lot?
That represents about a 60% increase in efficiency, which anywhere else in engineering is huge.
I think the answer is that it may very well be significant if that's the difference between loud enough and not quite loud enough, or loud enough with a hotter VC and more compression than if you didn't have the extra 2 dB.
To those who say 2 dB isn't a big difference in loudness, I guess that's personal, as many times the 1 dB steps on my volume control seem too coarse.
OTOOH, the above applies to midrange freq but perhaps not the low freq we're talking about here.