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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: Near-field listening with a sub posted by tantra on March 28, 2007 at 15:03:52:
Placing the subwoofer right next to your listening position theoretically gives the smoothest possible in-room response for a single subwoofer. This is because it's the only subwoofer positioning strategy where the direct output (which is probably quite smooth) isn't totally buried by the room's acoustics. Usually it's not practical aesthetically, or if it is the subwoofer can still be localized as a distinct sound source because the crossover is either too high or the rolloff too gradual. In those rare cases where it's aesthetically and sonically feasible, it's the thing to do.There's a strong correlation between smooth frequency response in the bass region and the subjective impression of bass "speed". My guess is that the smoother frequency response you're getting is helping out in that department.
Also, all crossovers higher than first order impart a phase lag to the low pass driver. For a second order crossover there's a 180 degree (1/2 wavelength) phase lag; for a fourth order crossover there's a 360 degree (1 wavelength) phase lag. By locating the subwoofer closer to the listening position by either 1/2 wavelength or 1 wavelength at the crossover frequency (depending on which is applicable), you are improving the phase relationship at the listening position. I've read mixed things about the audibility of phase anomalies in the low bass region so can't say for sure this makes an audibly significant difference, but it can't hurt.
Duke
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Follow Ups
- Re: Near-field listening with a sub - Duke 16:22:58 03/28/07 (0)
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