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Aux feed subs?
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<blockquote data-quote="Phil Graham" data-source="post: 90147" data-attributes="member: 430"><p>Re: Aux feed subs?</p><p></p><p>Evan,</p><p></p><p>Silas' post is a good one. If you have good phase alignment about the nominal crossover point, then you'll be in good shape for phase alignment as the effective XO point changes. This isn't always achievable, but the situations where you might have a hard time doing this would make for a very long post.</p><p></p><p>As the effective XO point get raised, and the wavelengths get shorter, the resulting tolerances for speaker placement and overall phase alignment are reduced. A few ms is not a big deal at 50Hz, but it is at 200Hz.</p><p></p><p>In several instances where I had sufficient DSP resources, I have used an allpass to help broaden the range of phase alignment between the subwoofers and main speakers, with the goal of making the aux fed subs and the tops in phase alignment over a larger frequency band.</p></blockquote><p></p>
[QUOTE="Phil Graham, post: 90147, member: 430"] Re: Aux feed subs? Evan, Silas' post is a good one. If you have good phase alignment about the nominal crossover point, then you'll be in good shape for phase alignment as the effective XO point changes. This isn't always achievable, but the situations where you might have a hard time doing this would make for a very long post. As the effective XO point get raised, and the wavelengths get shorter, the resulting tolerances for speaker placement and overall phase alignment are reduced. A few ms is not a big deal at 50Hz, but it is at 200Hz. In several instances where I had sufficient DSP resources, I have used an allpass to help broaden the range of phase alignment between the subwoofers and main speakers, with the goal of making the aux fed subs and the tops in phase alignment over a larger frequency band. [/QUOTE]
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