PA speaker repair

[ChChChad]

I have a Kustom PA speaker that can handle up to 80 watts. A 120 Wat
guitar head was plugged into it and now all that comes out of it is
faint crackled signal. I can tell what I'm playing when I play troug
it but it is just very quiet and distorted. What have I blown and ho
can I fix it if it even can be fixed

 

[jakdedert]

I have a Kustom PA speaker that can handle up to 80 watts. A 120 Watt
guitar head was plugged into it and now all that comes out of it is a
faint crackled signal. I can tell what I'm playing when I play trough
it but it is just very quiet and distorted. What have I blown and how
can I fix it if it even can be fixed.

Time to shut off the amp and plug another speaker in. Hopefully 'all'
you've blown is that Kustom. Keep playing and you'll likely blow the
amp as well.

jak

 

[Dave Plowman (News)]

A 120 Watt guitar head

What's that?

 

[Arfa Daily]

What's that?

A 120 watt head dimensioned for lead guitar ? That's what I tend to call
them as well, Dave. As opposed to a 'combo' or 'slave' or 'bass head' ??

As far as the OP's problem goes, it is likely that the voice coil has
overheated and boiled the insulation on the wire making up that winding.
This causes it to 'bubble up' and effectively increase its cross section,
which in turn causes it to fill up the tiny air gap that it runs in, making
it foul the magnet pole pieces and drag or totally seize, as it sounds like
has happened in this case.

Speakers can be re-coned by specialist repairers, but unless you are
particularly 'in love' with the sound this specific speaker makes, you may
as well just scrap and replace it. Replacement drivers for this market are
surprisingly cheap, and you will almost certainly find that your local PA
equipment store carries such replcements 'on the shelf'. I agree with jak
that if you keep trying to use it, you are likely to fry the driving amp as
well.

Arfa

 

[Meat Plow]

I have a Kustom PA speaker that can handle up to 80 watts. A 120 Watt
guitar head was plugged into it and now all that comes out of it is a
faint crackled signal. I can tell what I'm playing when I play trough
it but it is just very quiet and distorted. What have I blown and how
can I fix it if it even can be fixed.

Replace the speaker.