17 foot pipe sub 12-230 Hz ±5dB

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I tried to simulate a pipe with stuffing for Eminence Kappa 15 LFA and RCF LF15x401. The Emininence seemed to be flatter in a pipe even though inferior in about every parameter. The cross-section area of your pipe is roughly 17"x17" / 3, am I correct?
 
Yes, roughly correct, maybe a bit smaller like 280 sq inches, about total 17 feet, no gussets in corner-turns (so as to blur the turn radiuses which is opposite to what the sim-TL folks want), walls made of pressed cellulose absorbent, blocks of fiberglass board strewn about....

One goal was to blur the tuning and the plots seem to show my labyrinth is happily under-tuned particularly once the stuffing is added.

B.
 
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