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why do the access panels on a tuba24 need to be air tight?

Posted: Mon Sep 08, 2025 5:41 pm
by Colorado Hick
I would think that having venting behind the speaker would make it more efficient and not impact the sound coming out the horn. In my (admittedly unscientific) tests I could not hear a difference with the covers on or off.
My apologies if this has been covered before...

Re: why do the access panels on a tuba24 need to be air tight?

Posted: Mon Sep 08, 2025 6:25 pm
by Radian
Primarily to maintain the box tuning below the horn cutoff frequency, among a few other design considerations.