Building A Talkbox (need amp circuit)

[RJB510]

Well. This is just what has happened to me recently. I have used a 20w SS amp, and used its internal distortion circuit to power the 200w horn driver i have. But its blown the coil from the Diaphragm. I'm not sure if it was a fault with the driver, because I haven't had the amp up too loud, just that it has ended up crackling on every odd occasion on some notes. Anyway, its split half the coil off the side.

Any suggestions as to whats done this? I haven't had the master volume above half (and that wasn't very loud) and have only had the input gain at about 1 (if that). And its managed to break the coil free on one side.
I think it may be a manufacturing fault, because seriously, I would imagine that it would need to be very loud (ie, teeth rattling) before it starts to break a coil apart)

Could this be because I don't have enough Head Room? whatever that is on the amp? I'm using a 22uf Cap in series to filter out the Lows, but its just not going so good currently.

Also, whats the best way to fix it? I was thinking 5min epoxy could glue it back on? And suggestions to stop this from happening again?

Cheers

[petemoore]

Could this be because I don't have enough Head Room?
  Would be my guess, also I've had diaphrams which where 'hanging on by a thread' and it only took a little push to break it.
just that it has ended up crackling on every odd occasion on some notes.
  Kinda figured you'd be safe @200w driver, but ye never know, and too small a SS amp has been the end for many a driver coil.
  Fixing them has mixed bag results, tackin' it back together, unwrappin' a coil, and managing to tack on a solder joint, not much room in the magnet structure for anything on the coil, glue sparingly, using temperature resistant type epoxy, Can only really say it's worth a try.
 

[RJB510]

I'll have to investigate then. The threads are still intact to the cone. Imagine the middle of a semi circle with the threats connected +ve and -ve at each end of the semi circle are still connected. Just the middle has popped off, so i'll try and see how I go.

The nice people are going to send me a spare Diaphragm, but i'd rather blow the first one again than the new one.

The other reason I could think of for it blowing is that my other solid state amp - 15w, (before i scored this one) has a tendency to go nuts and uncontrollably distort, with no audible music/sound. Like a huge short circuit that the volume control won't change. This basically pushes the speaker to the max, but my 15amp speaker seems to handle that better. I accidentally connected my horn driver to this one with no cap once which made one hell of a racket for a brief second... That might have been enough to just start some damage and break the coil free, because it really would have been clipping hard for just a moment.

But i'll try and figure something out.