AVS Forum Special Member
Join Date: Nov 2006
Location: Bushnell's Basin, NY
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Mike, if you can hear 20Hz, more power to you, but I will wager that the sensation isn't aural if it's a pure tone through a good sub. Also Sprach Zarathustra came on a cable music channel one night, and I recognized it from the first note. I did not hear that note...
Arny, yes, THD, because in my mind, "20Hz" is a pure tone, not an instrument playing that fundamental with associated harmonics and overtones. Thus the reference to REW for its frequency generator. Can't blame a sub for reproducing harmonics in the input.
Local, that's what I'm counting on, because the complexity is a result of energy removed from the reflected wave. My room modes are very benign, the exact opposite of many folks here. I long wondered why, then studied low frequency absorption and realized my room is full of diaphragmatic absorbers - windows/glass door, sheet rock on studs, paneling on standoffs - and has a double doorway and corner cabinets that spread the (100) resonance over a wide frequency range, or perhaps forms a huge (if unoptimized) Helmholtz absorber. In this case, adjacent rooms diffuse modal behavior, reducing audibility of modes in the listening room. I can't speak to the rest of the house, but bass does follow you out of the room.
The fundamental point was that perhaps "best" isn't required, just "good enough," and if you have a forgiving room, it may not be that hard to find a combination you find acceptable, even if it's not the absolute best possible result. The 80/20 rule applies.