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Power delivery and line-level v. speaker crossovers

Posted by jeffreybehr (A) on July 12, 2005 at 18:18:53

I’m confused, a common state for me when it comes to electronic theory.

When biamping a speaker with a line-level crossover, I understand that the amp won't be consuming any of its power amplifying frequencies it's never fed. For example, the amp simply doesn’t see the bass frequencies that are reduced/removed by the filter, so all its power is available to amplify the MR and treble frequencies.

However, isn’t that also true when passively biamping–that is, when using the speaker’s internal crossover, assuming we have identical crossover points and slopes? The MR/treble amp’s output stage sees significantly higher impedances at the lowest frequencies that are being reduced/removed by the speaker’s filter, so it delivers less current, hence less power, into those impedances, thereby having more energy available for the rest of the band.

Yes? No?

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