Damaged speaker?

[oceanoasis]

Hey all,
I, m currentl running my ampeg svt2 pro through my ampeg 410 hlf cab. Last night at rehearsal, the cab sounded really muddy and not quite right.

One of my band mates says that his buddy also has a 410 hlf and it's got a much clearer sound. He thinks that my cab might have a damaged speaker, or a torn cone or something.

My question is how does one tell if the speakers are damaged and in need of replacement? I could check the resistance on all of them with a volt meter, but is that going to tell me anything?

Any ideas or suggestions to help would be appreciated.

Thanks,
Matt

[jastacey]

Here's what I'd do ... Pull the grill off, and gently push each cone in, and see if there is any rubbing feel/sound of the voice coil, you can pull each driver and ohm them to see if there are any shorted voice coils ... the multi-meter reading will be a little lower, than the actual speaker ohm { an 8 ohm speaker, will read anywhere from 5.8 ohms to 7 ohms }

[oceanoasis]

Cool, thanks for the help. I'll give it a try right now.

[oceanoasis]

All right, so I had a look at the speakers and cones. No resistance when gently pushing on them, however I do see that the top two speakers have what looks like creasing or something on the paper cones. Both speakers have this creasing on the outer edges of the cones, right near where they are glued to the corrugated area that allows the speaker to move back and forth.

It almost looks like the paper cone cracked in these areas, but it's not. It looks like a crease or a pressure ridge that runs about 270 degrees around the speaker cone on the outer edge by the glue line.

I'll check the resistance in a bit. Any more opinions are appreciated.

[jastacey]

Post a photo of the creased speaker, if you can .... try pushing gently on the speaker that don't have the creasing and see if there is any air moving out of the creased area, the speakers should move out when one speaker is pushed in, as I believe the cabinet is a sealed design

[seedokebass]

I had an Aguilar GS410 that I somehow popped all four speakers in. They looked fine, checked out okay with the 9v and speaker cable test. Brought it to a shop and they still said it was fine!

It still sounded crappy, so I pulled them all out. To my surprise, they were torn all the way around on the back!

[Bass_Pounder]

Creased cones are a sign of over-excursion from being pushed too hard.

They need to be replaced.

[oceanoasis]

Ok, so I pulled the speakers out. No other sign of problems, but I think that the two speakers with the creases are replacements and not the originals. The stickers have the same model numbers and ohm ratings but look completely different. Also, I'm no expert on paper cones but the bottom two speakers which are the originals seem to have thicker paper cones than the top two which are the alleged replaced speakers.

Sigh, I have a feeling I'll be replacing those two speakers soon. Or maybe I'll trade it in for another type of cab. Hmm, food for thought!

Matt

[oceanoasis]

Having technical issues with the computer at the moment, so I can't upload any photos at the moment. I'll try a bit later.