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RE: Mirage M1Si - bass comments

Posted by Duke (D) on January 31, 2008 at 14:46:29

In Reply to: RE: Mirage M1Si posted by Pneumonic on January 31, 2008 at 13:33:55:

I'm no expert on Mirage, but I do build bipolar speakers so might be able to make a comment or two.

A bipolar speaker should be set up with a lot of space behind it, like five or six feet. The reason is, if the additional reverberant energy from the rear-firing drivers arrives too early it can cause coloration along with degraded clarity and/or degraded imaging. If output from the rear-firing drivers arrives with about 10 milliseconds delay relative to the direct sound (corresponding to a path length difference of about 11 feet), the additional reverberant energy imparts greater richness and liveliness without the negative side effects mentioned. The same principle applies to dipoles and omnis.

Now if a speaker is placed well away from the walls, its bass response won't get much boundary reinforcement so the typical result is weak bass. I suspect this is the reason the Mirages bipoles were "voiced" a bit on the generous side bass-wise, and I suspect that often their alleged loose bass could be at least partially attributed to placement close to the walls. This is just a guess though.

Duke

Edits: 01/31/08

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