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<blockquote data-quote="Bennett Prescott" data-source="post: 57521" data-attributes="member: 4">Re: How to build a flat-phase DSP preset?Michael,I find speakers with minimal phase shift sound better, and are certainly easier to align with other speakers. Perhaps I am fooling my bronze ears, but knocking a few phase rotations out of a system sure makes it sound better to me. Of course, we&#039;re talking gross discrepancies, not 30° here and there. Certainly there are compromises to be made, but reasonably good designs can be made reasonably phase flat for most of their coverage pattern. Certainly a 12&quot; woofer and a silk dome tweeter crossed at 3kHz are going to exhibit lots of warping even slightly off axis, no matter how flawless they may be on axis.What I am referring to in my post is not utopian. It can be implemented with standard crossover filters and a little delay, with the help of a loudspeaker design that allows for significant overlap between passbands. This is not so unusual, there is always some overlap or else crossovers wouldn&#039;t work, so another half an octave between friends on either side of the &quot;crossover point&quot; is only a big deal in pretty marginal designs. The result has some magnitude ripple and is nothing like textbook, but it does maintain the impulse response pretty well and I think sounds significantly better. If you&#039;re really clever (and I sometimes am by accident) you can even use the overlap to increase power response and reduce pattern dissimilarities between passbands.I&#039;m not sure that the interest is to have a multi-way system where every driver exhibits positive pressure for positive voltage. I don&#039;t believe this is a requirement for a low phase shift system. Perhaps I am wrong.</blockquote>

[QUOTE="Bennett Prescott, post: 57521, member: 4"] Re: How to build a flat-phase DSP preset? Michael, I find speakers with minimal phase shift sound better, and are certainly easier to align with other speakers. Perhaps I am fooling my bronze ears, but knocking a few phase rotations out of a system sure makes it sound better to me. Of course, we're talking gross discrepancies, not 30° here and there. Certainly there are compromises to be made, but reasonably good designs can be made reasonably phase flat for most of their coverage pattern. Certainly a 12" woofer and a silk dome tweeter crossed at 3kHz are going to exhibit lots of warping even slightly off axis, no matter how flawless they may be on axis. What I am referring to in my post is not utopian. It can be implemented with standard crossover filters and a little delay, with the help of a loudspeaker design that allows for significant overlap between passbands. This is not so unusual, there is always some overlap or else crossovers wouldn't work, so another half an octave between friends on either side of the "crossover point" is only a big deal in pretty marginal designs. The result has some magnitude ripple and is nothing like textbook, but it does maintain the impulse response pretty well and I think sounds significantly better. If you're really clever (and I sometimes am by accident) you can even use the overlap to increase power response and reduce pattern dissimilarities between passbands. I'm not sure that the interest is to have a multi-way system where every driver exhibits positive pressure for positive voltage. I don't believe this is a requirement for a low phase shift system. Perhaps I am wrong. [/QUOTE]

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