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I wonder why so many subs don't do well below 20 hz. Internet direct companies like Deep Sea, Funk Audio, and Seaton go down to 10 hz. For music it shouldn't matter, the lowest hz in symphony is 16 hz, same with organs. But movies go down to 7 hz in extreme cases.
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Hi Mouse - All else being equal, halving the frequency quadruples the distance the woofer has to travel to create the same SPL. So going from 20 Hz to 10 Hz causes the displacement to increase 4x!
A 12" woofer will move about 1.5" one way, 3" peak to peak to make 105 dB at 20 Hz in a medium sized room. This is the limit of what most conventional subs can do. If you drop the frequency to 10 Hz, you get a one way excursion of 6"! Unless you go to an unconventional motorized sub (Seaton) you just can't get there.
Drop the level to about 90 dB and a normal sub can do it.
Tom
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Main System:
Amati Futura Mains
Amati Homage VOX Center,
Proac Response 1sc Rears,
Three MC2301's for L,C,R
MC 602 for the rears
C 1100, MX 151, MCD 1100, MR 80
Nottingham Dais with Wave Mechanic
Sumiko Palo Santos Presentation
SurfacePro 3, RPi 4, ROON, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC
MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material.
Lake House:
Ohm F, MC 275V, C2300, MR 77, Rega P3
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