Comments on: Reconing an Eminence JAY7010 Subwoofer Driver

By: Keith Neufeld

Keith Neufeld — Thu, 18 Feb 2010 00:36:19 +0000

Joe, excellent analysis; thanks!

When I recone the next, I’ll heat the coil and see whether the adhesive softens, becomes brittle, or what exactly. I suspect you’re exactly on track.

By: Joe

Joe — Thu, 18 Feb 2010 00:30:27 +0000

“The voice coil looked exactly like this when I removed it from the voice coil gap. Obviously it had overheated and melted the coil wire, but why was it all gnarly like this? Maybe it welded itself lightly to the basket and decoiled when I pulled it out of the gap.”

Actually, I don’t think it overheated and melted the coil wire. It probably got hot enough to melt/soften the adhesive binding the coil to the tube. When you run electricity through a coil like that, the wires all sitting next to each other suddenly want to get away from each other, so there’s an ever-present force trying to “explode” the coil. Once the glue melted, the coil was able to un-coil and the wire probably caught on something and broke immediately, or it rubbed on something until it wore through.

By: Sound Speaker Repair

Sound Speaker Repair — Mon, 04 Jan 2010 19:38:08 +0000

We do not have kits for Yamaha speakers. We do have original kits for all Eminence brand cast frame speakers but not OEM speakers made by Eminence. We carry a very few select recone kits that we consecrate on to keep the kits we sell the very best kits available.

Yes, the damping solution goes on the pleats. The damping solution is used to seal cloth surrounds so air does not pass throw the surround. With that being said, you do not need to put the damping solution on the part of the surround that attaches to the cone or the frame but it wont hurt either. It does not matter if you do it at home or if the factory does it for you, but if the factory does it then you don’t have to saving you time. FYI, we pre-treat every surround on our kits with damping solution before they leave our shop.

By: Keith Neufeld

Keith Neufeld — Mon, 04 Jan 2010 19:08:28 +0000

Sound Speaker Repair, it’s very thoughtful of you to comment here even though I bought this kit from your competitor! (I think you didn’t have this particular kit, or I couldn’t find it at the time.)

So the damping solution goes on the pleats??? The entire fabric section, or just the pleats? What’s it for, and why is it better for me to apply it at home than to have it applied at the factory?

By: Sound Speaker Repair

Sound Speaker Repair — Mon, 04 Jan 2010 18:51:54 +0000

Yes you need to apply the damping solution to the pleats of the surround.

By: la23ng

la23ng — Mon, 04 Jan 2010 18:37:15 +0000

Ah, no suggestion, but a question: have you got an idea what sort of adhesive that was?

By: Keith Neufeld

Keith Neufeld — Mon, 04 Jan 2010 14:31:29 +0000

Jared, I didn’t think of that scene, which probably means it’s been way too long since I saw it in the theater and my previous sub was Mr. Inadequate. I’ll give it a shot the next time my wife is out of the house.

Commence suggestions of other scenes I should have tried …

By: Jared

Jared — Mon, 04 Jan 2010 14:27:31 +0000

You didn’t test it on the Matrix’s Lobby scene?