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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: Re: You are comparing apples to oranges... posted by Tyson on July 31, 2002 at 10:05:12:
In my room, I get a fairly flat bass response down to about 25 hz, then a dip to about 22 hz, then a pretty steep roll off below that. That is measured w/test tones spaced 5hz apart, using a RS SPL meter at my listening position, and using correction values for the known RS SPL roll off at the frequency extremes.But, there are some spikes and nulls that are there, certainly, and those are known room modes. I'm a little lucky that these response anomolies are very narrow band, so they tend not to affect a large range of bass material.
Perhaps the measurements would look better if they were taken quasi-anechoically - or ground-planed. Just take the speaker/amp/tone generater/mic outside, 60 feet from any reflective surface, and set up the measurements. For bass the measurement should be at 2 meters to take in to account the boundary re-inforcement from the ground. That way you don't have to worry about the room influencing the measurements. Of course, if you have access to an anaechoic chamber, use that instead :-)
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Follow Ups
- Another observation - Tyson 12:42:35 07/31/02 (0)
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