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Old 13th December 2004, 11:39 AM   #1
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Question Bi-amplification equalizing options

Consider a bi-amplified 2-way loudspeaker.

One amplifier is connected in a balanced connection, resulting that it provides higher SPL values than the other amplifier, so the two options are:

Opt. 1 - Use a tweeter of higher sensivity (like 95dB) and a woofer -3dB (91dB in the example).

Opt. 2 - Introduce an -3dB attenuation circuit before the tweeter.

Which one do you recommend?

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Old 13th December 2004, 12:50 PM   #2
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I always include some sort of level adjustment for the tweeter, since even if you match the nominal sensitivities of the drivers, there is no guarantee that they will actually match well at the crossover. Plus it then frees up your choice of drivers.
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Old 13th December 2004, 01:47 PM   #3
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Mr Evil

Fixed or variable level adjustment? If variable, of what kind?
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Old 13th December 2004, 02:08 PM   #4
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I usually just use a pot at the amp frontend, and my ears
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Old 13th December 2004, 04:09 PM   #5
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Usually a trim pot which I set once and then leave alone. With proper measurements then maybe fixed attenuation (or gain if you happen to have a less sensitive tweeter) would be better, but I prefer to have the flexibility to make adjustments so I can change drivers easily if needed.
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