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Speakers/Capacitors

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jonathand1000

New Member
Hi,
I've noticed that in some (digital) loudspeaker drive circuits there is a capacitor placed before the loudspeaker. What is the purpose of this? Is it to make the square wave more sinusoidal?

Thanx alot,
Jon
 

Exo

Active Member
Its mostly used to keep DC away from the speaker.
The capacitor will let AC (music) pass, but will form a barrier for DC
 

Screech

New Member
(digital) loudspeaker drive circuits ?

Caps can act as filters to filter unwanted frequencies.
You dont want low frequency to go to a tweeter, so, filter some of the low frequency out.

You want high frequencies going to a subwoofer, so filter some of the high frequencies out.

Use the chart below to sellect coil/capacitor for 6 db frequency reduction.
 

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jonathand1000

New Member
Re:

Ah, thanks alot, I see now...that's cleared up something I've been in the dark on for a while. Just shows how much of a newbie I am I suppose! :oops:

Anyway thanks,
Jon
 
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