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AudioKinesis Cabs V!!!!

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I just got an inquiry about what happens to the box tuning and low-end behavior when port plugs are installed on the TC212. The cabinet has three 3" diameter flared ports in a vertical line on the back of the cab, with the top and bottom port right behind the woofers and the middle port centered between them.

No plugs = 48 Hz tuning frequency, -3 dB @ 56 Hz, "flat" upper bass region (sounds "big").

One plug (middle one to maintain symmetry) = 40 Hz tuning frequency, -3 dB @ 60 Hz, a little bit less upper bass energy (medium bigness, a little tighter).

Two plugs (top and bottom) = 29 Hz tuning frequency, -3 dB @ 70 Hz, even less upper bass energy (starting to get lean, and tighter).

Three plugs = sealed box (Qtc = .54 ballpark), -3 dB in the lower 90's (definitely on the lean side of the spectrum).

I may not have included three plugs with all of the TC212s that went out, so if anyone with a TC212 needs more plugs, shoot me an e-mail or private message and I'll take care of it.
 
I've been sending mine out with one plug because I didn't think the cabs sounded good with two---but also because of the possibility of asymmetrical loading on the woofers---likely not a real issue.

I'd also be happy sending extras---let me know.
 
I've been sending mine out with one plug because I didn't think the cabs sounded good with two---but also because of the possibility of asymmetrical loading on the woofers---likely not a real issue.

I'd also be happy sending extras---let me know.

My bad - I told Mike to do that, and I did it too.
 
Even though I like the bigness of all ports open on the TC cabs, I'm finding increasing uses for plugging the ports. In rehearsal situations in untuned or odd shaped rooms you have more control over the sound and it can help reduce boominess.
 
Even though I like the bigness of all ports open on the TC cabs, I'm finding increasing uses for plugging the ports. In rehearsal situations in untuned or odd shaped rooms you have more control over the sound and it can help reduce boominess.

I like two plugs in the TC115 when using acoustic bass. Decreases the boom and tightens the sound.
 
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