Are my speakers beyond repair?

[ManRay]

Hi,

I have a pair of eminence 12's that I pulled out of a Marshall valvestate 100 to replace the blown speakers in my B-52 AT-212. The speakers worked fine for a while but the B-52 encountered power tube trouble which took a screen resistor with it...

After repairs the amp never came back to life. The output was thin and tinny especially in the dirty channels.

I recently plugged the amp into a separate speaker cab and she came back to life. So... the speakers are bad, but not dead, and I am wondering if they are beyond repair or if I can get in there and bring them back to life?

Thanks,
Mr.

[captntasty]

Most likely they can be repaired... the voice coil probably melted/deformed but isn't completely open - the structure is frozen so you get some sound but it's all high freq's. If you were to bring them to a shop it would probably cost the same as replacing them or close to it. If you're adventurous and a diyer you could do the work yourself. The whole speaker needs to be taken apart, frame cleaned of adhesive residue and you'd need to find the proper size coil, cone and spider. You'd need to get all the adhesives, probably a cone (it is fairly difficult to salvage after removal), spider, voice coil, shims, maybe braided lead wire, etc... still going to cost some $$, maybe not as much as a repair shop but you will have had the experience.

[ManRay]

Resources?

Sounds good,

Does anybody know of any online resources to get the parts I need or help walk me through the process?

Thanks,
Mr.

[captntasty]

To Get Started

Here's a quick tutorial:

Speaker Reconing Instructions

There are a few more out there - google it, get as much info together as you can. They sell entire kits but I don't think they are suitable for guitar speakers and they are typically pricey. A better source would be Weber:

https://taweber.powweb.com/parts.htm

You have to order the proper sizes though... take some measurements when you disassemble... then, ask their service department if they know what cone/spider/coil to use for your particular model and provide them with at least rough measurements of what you have.

The coil has to be pretty much exact and the spider and cone will be fitted around that. Just take it one step at a time - right now you need to know how to disassemble it - you might be able to salvage the spider, maybe but probably not the cone and obviously not the coil.

You will need some heavy duty solvent - Acetone, MEK, etc.. (in a well ventilated area!) depends on what adhesives were used in construction. Try to remove these parts as whole as possible as you will have something to use as a reference but it very well may be a matter of ripping it all out. What you'll be left with is the magnet and frame... all the remaining adhesives and other garbage will need to be removed then start from there and rebuild.

The answers are out there, you just have to look...

[ManRay]

Thanks!

Well it looks like I have my work cut out for me. Thanks for all of the info. I had better get crackin'!