Shunting capacitor?

[goraman]

What dose a shunting capacitor do in a speaker crossover (I know it shunts to ground but that's all i know ?
Dose it roll off the top of the mid/bass driver where the tweeter takes over?
would it have any effect on the sound?
I would think it is in the path or is it?

[goraman]

No one has heard of this?

[Reid Malenfant]

Oh, I meant to reply to you earlier but as I'd read the post I couldn't see it again & clean forgot about it :doh:

Yes, it connects from say the bass/mid to ground & after the low pass inductor. It's not in series with the voice coil, it's in parallel. So in effect it's not quite so important as it's shunting to ground as the name suggests.

What I mean by not quite so important is that only the inductor/s would be in series with the voicecoil & so the capacitor will have less effect on the sound.

In the case of a tweeter this would be reversed as the capacitor would be in series & inductor in parallel (shunt duties) :)

[goraman]

Thank you Mark,
Dose it roll off the top of the woofer where the tweeter takes over?
I'm thinkin yes?

[MartinT]

In the woofer circuit, the shunt capacitor will roll off the treble frequencies. You would expect to have an inductor in series to prevent it from trying to roll off the entire output of the amp :)

[goraman]

In the woofer circuit, the shunt capacitor will roll off the treble frequencies. You would expect to have an inductor in series to prevent it from trying to roll off the entire output of the amp :)

Thanks Martin,
I have so much to learn about x overs.
but enough for now.

I'm a little figgity tonight as instead of the usual beer or shot of whiskey I'm doing PG tips. and a biscuit.

Substitution helps but I feel a little anxious and just slightly shaky a pretty normal reaction for a guy who has had a drink nearly every day since as long as I can remember.
Not so much time spent on the wagon really.

[MartinT]

Stick with it, Jeff. If you want something a little more edgy, try Rooibos tea (black, of course). if you've got the shakes, it shows that you were drinking too much before, so hang in there as you know you're doing the right thing.

[sq225917]

If you have drunk every day and are having physical withdrawal symptoms then you should really seek the advice of a medic. Unlike every other drug you can take you cannot just go cold turkey on alcohol, it's the only dependency creatIng substance that you really do need medical advice to safely wean yourself off.

Good on you for stopping, but do it right. ( the mrs is a drugs and alcohol
Counsellor)

[goraman]

Stick with it, Jeff. If you want something a little more edgy, try Rooibos tea (black, of course). if you've got the shakes, it shows that you were drinking too much before, so hang in there as you know you're doing the right thing.

It's not a full on shake just a very mild tremor that comes and go's when I'm very still and a general restlessness.
I am going to try some Rooibus tomarrow if I can find it.
Thanks, Martin

[Trickie_Dickie]

It can be more complicated than that. Speaker manufacturers also use extra capacitors, inductors and resistors to influence impedance, balance and phase characteristics. The choice of components can be quite critical.