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Re: multiple subs - why they are a requirement for great bass

When I added a second sub (temporarily on loan from my neighbor) to the system, it was positioned in the right front corner, symetrically opposite my sub. This configuration was much smoother than the single sub, but still not good enough. Re-positioning my single sub to the sidewall midpoint is better yet. Still, there is room for improvement, and I'll borrow my neighbor's sub again to check out the pair against opposite sidewalls.

On the issue of needing multiple subs because of left channel / right channel information, I confirmed this is required. Using test tones and disabling the mains, the subwoofer is clearly audible up to 200 Hz! And this is with a 24dB/octave crossover, with crossover frequency around 60Hz. A natural way to side-step the stereo signals is centrally locating a single sub between the mains, with summed left and right channels. When Bruce Edgar demos his horns, he uses a single Seismic Sub on the front wall, foregoing the second sub. I can relate to this due to the size of the enclosure (refrigerator-sized).

I am finally getting a glimpse of "quality" bass, after moving the sub out of the corner. This is a goal worth pursuing. To me, great bass is not about SLAM or other audiofool stuff. Great bass provides a robust foundation which supports the music, provides ambient and spatial information about the size / dimensions of the venue, and believe it or not, manifests itself most clearly in a better midrange experience. Unfortunately, great bass is really hard to obtain without effort, knowledge, and probably some element of luck.

scott



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