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crossover

Posted by Duke (D) on March 25, 2007 at 23:18:47

In Reply to: Re: addendum posted by Sonhouse2 on March 25, 2007 at 22:33:34:

Acoustically, they do have a crossover. The ad copy may say "crossoverless", but that refers to a lack of the electrical components that are typically used to induce an acoustic rolloff. The signal crosses from the woofer at low frequencies to the tweeter at high frequencies; if nothing else that's an acoustic crossover. The presence of a capacitor on the tweeter makes it an electro-acoustic crossover.

The woofer obviously rolls off all by itself (either due to cone mass or voice coil inductance or both), and the tweeter may well have some acoustic rolloff in addition to the 6 db per octave imparted by the cap. Whether the net acoustic slopes are first order (6 dB per octave) or second order (12 dB per octave), I do not know.

First order crossovers are very sensitive to driver physical alignment, whereas second order crossovers are not. So if the net acoustic slopes are first order, then the tonal balance and imaging will benefit from aligning the drivers properly with respect to ear location.

Duke

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