2 newbie things I'm finding confusing:
1. When I view frequency response of 12-15" sub drivers on manufacturers' pages (they usually say it's a sealed or vented box and specify volume), they all drop off sharply at about 50 Hz.
I've looked at this for the ScanSpeak driver, as well as SB Acoustics, B&C, BMS, Beyma, Sica, Dayton.
So to implement these drivers I would have to do massive EQ boosts in the low end? That seems bad.
What I mean is, on a commercial sub, say https://www.audioholics.com/subwoofer-reviews/monolith-13201d-thx-ultra/conclusion , the drop off occurs at a much more impressive ~20 Hz.
2. The ScanSpeak 32W has a resonance frequency of 18Hz. Does that mean I cannot have extension to say 16Hz (pipe organ lowest note), because it requires crossing the 18Hz Fs which will presumably sound unpleasant?
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I'm not after massive SPL (my room is small-medium at 2200 cubic ft), but I want to have low frequency extension to cover all material in movies (including 10-20 Hz range). I know it's not audible but maybe possible to feel.
My goal is to make something comparable to the Monoprice Monolith 13” THX Ultra or Perlisten D12S.
1. In practice you will get room gain too, but yes some EQ will typically be required. The smaller the box, the more will be reuquired. But as long as you stay below xmax that isn't necessarily a problem.
2. No, it will work below the fs as well. But the higher the fs, the harder it will be to get it to play the lowest notes. 18hz is a very low fs. This driver will easily extend to 10hz in-room.