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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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In Reply to: Precen vs. Present posted by klausDK on November 7, 2005 at 04:03:55:
Two things that are (IMHO of course) related.1) As I recall, it was at one time recommended that the total power response (i.e. averaged over all directions) should fall off at something like 2dB per octave above 2kHz. Since this is close to the increasing directivity of average speakers at the time, another way of saying it would be to try for flat on-axis response, combined with a smooth and monotonic increase in directivity index with frequency. Tweeters with broader treble dispersion will of course put more energy into the room if they are flat on axis, so technological improvements in small dome tweeters has increased the high frequency energy of speakers designed to the same "flat on-axis" requirement.
2) More and more, speakers are being built with narrow cabinets. Usually this improves imaging, but it also pushes the baffle step loss up to higher frequencies. At the same time, most low frequency design switched from actual testing (very difficult and expensive in the bass) to Thiele-Small models. Those models rarely included baffle step effects, so very many speakers are today, and have been for the last few decades, deficient in bass.
3) Perception of speed, transient response, and detail is enhanced when the bass is reduced.
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Follow Ups
- Re: Precen vs. Present - Paul Joppa 11/7/0515:56:13 11/7/05 (1)
- Re: Precen vs. Present - klausDK 04:25:45 11/9/05 (0)
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