Electronics, Lighting, & Gadgets - OT Why is there a capacitor on a tweeter?

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sknhgy
04-01-09, 10:42 AM
When you look at stereo speakers, there is a 50v .2uF(?) capacitor on one of the wires going into the speaker. Why? Is it a filter?

jsharr
04-01-09, 10:45 AM
I believe it filters out bass. I know when I had a system put in my jeep, they capped the speakers in the dash for that reason.
tad
04-01-09, 10:58 AM
It is a very simple high-pass filter. A high-pass filter lets high frequency signals through, while severely attenuating the level of lower frequency signals (i.e., bass).
See http://en.wikipedia.org/wiki/High-pass_filter

Unknown Cyclist
04-01-09, 11:10 AM
AFAIK the bass signal would damage the tweeter.