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sb12a - 423mm x 423mm x 180mm 18Hz-2KHz, 134dB max
what happens large signal? why do they seem to be drawing accolades ?
"specs" sb12a subwoofer
Beyma woofer employed I think in the 12" cabinet
Interview with Flare Audio's Davies Roberts
Edits: 01/31/17Follow Ups:
In airconditioning installations, sometimes long ducts have wide sections (atriums) along them to act as traps for transmitted sound (fan noise, rumble). That's what the labyrinth in your posted pic makes me think of. Could it have an effect in reducing the 'chuffing' of a too-small port?
"what happens large signal?"
A guess: maybe the duct is so narrow / flow resistance is so high that it barely functions when signal is large.
That is: maybe the design works as a ported box at low power, when airspeed in the duct is low (giving a good -3dB value for small signal tests) but acts as a tiny sealed box at high power (giving no bass but lots of power handling with larger signals).
...kind of like the programming on those VW engines :)
There's no such thing as magic, nor a way to get around Hoffman's Iron Law. I see a lot of hype, but no facts.
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