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.
-- ChChChad
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
What's that?
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*What boots up must come down *Dave Plowman snipped-for-privacy@davenoise.co.uk London SW To e-mail, change noise into sound.
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
Replace the speaker.
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