Electrostatic Speaker Crossover

Archived from groups: rec.audio.tech (More info?)

Hi,
I have just finished building my first esl pair which sound nice but
as many of you know hasn't got good bass output. So I was thinking of
making it a hybrid system utilising a magnetic driver for producing
the bass. My problem now is the vast difference between the output of
bass driver and esl when fed with the same output signal from amp(big
diff in sensitivity). So I want to equalise that as well. I have heard
a few things about active crossover and bi-amping but would prefer to
do a passive solution at the moment.
Any help appreciated.
Thanks
Manoj

Archived from groups: rec.audio.tech (More info?)

In article <djmyc.7881$RL3.129196@news2.e.nsc.no>,
Stig Erik Tangen <stigerik@newsguy.com> wrote:

>It could be possible to damp the esl with series resistors or L-pad, but
>I suspect the woofer has the highest sensitivity? Its not a good idea to
>put resistors in series with the woofer.

Agreed - wasteful of power, and likely rather expensive.

>A cheap and good entry-level solution is to get the 110$ Behringer
>CX2310 active crossover, and some kind of power amp to drive the woofer,
>which dont have to be all that expensive. This solution would probably
>be better than any passive crossover.

Another option would be to design some sort of shelving-response
high-pass filter, and install it between preamp and amp (or in the
tape-monitor path). The filter's knee frequency would correspond
(roughly) to the driver crossover point, and the amount of
low-frequency cut would correspond roughly to the difference in
sensitivities between the drivers. Could probably be done with one or
two dual op amps, I imagine.

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