[jkdas]

How does one calculate the correct value of capacitor to adjust the brightness/harshness/so on of a speaker?

I remember seeing just a cap in parallel to the OE tweeters I had on my Safari.

[abhibh]

I think what you need is L Pad

L-PADS

[jkdas]

Originally Posted by abhibh

I think what you need is L Pad

L-PADS

No, dont think so. Guess what I meant is some method to kill the shrill at high frequency.

[greenhorn]

chances are that its was in series, and you saw it wrong. Nobody connects a cap directly in parallel with a tweeter. It would act as a short & reduce high frequencies altogether.

Or unless it was used as a cheap alternative to reduce any supersonic frequencies ( proper way to do it is to use an inductor in series, and inductors are kinda hard to get)

[jkdas]

Originally Posted by greenhorn

chances are that its was in series, and you saw it wrong. Nobody connects a cap directly in parallel with a tweeter. It would act as a short & reduce high frequencies altogether.

Or unless it was used as a cheap alternative to reduce any supersonic frequencies ( proper way to do it is to use an inductor in series, and inductors are kinda hard to get)

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What I should have used was the term: Low Pass Filter I guess.

[bdubya]

Caps are usually used in series to filter out the accidental DC which could fry your voice coil

[greenhorn]

an LPF is used with a woofer
as the name implies, a Low Pass filter lets only lower frequencies pass through it.

[DerAlte]

There is no implication of *low frequencies* with *Low Pass Filter*, even though the most visible applications is for sub-woofers.

JK, do you remember the value of the capacitor? Unless the capacitor was of a *very* low value, it couldn't have been across the tweeter. Nothing would have reached the speaker. IF it was a small value, then your suspicion is true - to reduce the shrillness of the tweeter (Low Pass Filter to filter out higher frequencies. Even then this is not a good method, since it would be mucking up the real response of the tweeter in a rather empirical manner.

On the other hand, if it was in series it was to prevent frequencies below a certain frequency - and DC - from reaching the tweeter (High Pass Filter).

[Bass&Trouble]

Originally Posted by jkdas

No, dont think so. Guess what I meant is some method to kill the shrill at high frequency.

Unless you want to reduce the overall level of the tweeter using an L-Pad, your best bet for fine tuning the highs is to use the EQ in the head unit. If you had an RTA, you would be able to more accurately identify which frequencies are bothering you.