PDA

View Full Version : Fluttering sound coming from woofer


Jakeisuseless
10-22-2005, 11:06 AM
Well... I've had my L166s for a couple weeks now. I refoamed them myself.... now I'm getting a fluttering sound.... I small peice of the glue broke from the cone pushing them real hard. I reglued that 1/2 inch long section and put a little extra glue around the edge of the cone. I let them dry all night and I'm still getting this fluttering sound. There wasn't any other portions that the glue broke that I noticed. I'm not saying that it's impossible... just that I don't think so.

I did not get anywhere near the range that these would blow... I didn't even have the hooked up to my main receiver I bought for them. I had them hooked up to my modern Pioneer VSX-D514 that only pushes 120 watts peak per channel. (Though I did get an overload shut off.)

Any thoughts on what the problem could be? I would investigate further but I bearly had the time to post this.
Don C
10-22-2005, 11:36 AM
I have had a sound like that from having the surround coming loose from the frame. Try pulling on the gasket all the way round, and see id you can find a loose spot.

Make sure that the tinsel leads are positioned so that they don't slap the cone when it moves, and also the speaker wires inside the box, you want then routed away from the cone.
Jakeisuseless
10-23-2005, 01:07 PM
I made an interesting and somewhat scary discovery when I got a chance to work on them. The cone doesn't want to push it. It moves about a milimeter and then it stops. I have no clue what would cuase this... *heavy sigh*
Jakeisuseless
10-23-2005, 05:50 PM
Anybody, any input?
speakerdave
10-23-2005, 06:32 PM
Could be fried and welded to the pole piece. Does it make any music at all?

What you are calling "fluttering" may have been the voice coil rubbing.
Jakeisuseless
10-23-2005, 08:06 PM
It really doesn't sound like a rubbing at all. It doesn't really sound mechanical... It sorta sounds different now. It's like if a bottle of tic-tacs (or maybe tiny plastic balls.) was on the shelf in front of my woofer. (And you couldn't hear the speaker that was vabrating it....)

When I pull the cone out during play back it stops somewhat. The woofer does not press in from it's natural point at all.
DavidF
10-23-2005, 08:26 PM
No, does not sound good. Just in case the voice coils are still in OK shape, you should not try to drive them all. Did the action seem OK before you reconed them. Did you use shims or some other way to align the coil in the gap during the recone?



DavidF
analogman
10-23-2005, 08:49 PM
You fucked up your drivers. Ask the questions before it's too late. I am sorry for your speakers, but not for you. This is a good example/analogy of why doctors go to school for seven years or more, and even then some are still HACKS. This is why malpractice insurance is so damn high, the HUMAN element, you know? There's no shortage of talent at this forum, maybe someone can/will repair them for you.
Regards,
Analogman
Rolf
10-23-2005, 09:30 PM
It really doesn't sound like a rubbing at all. It doesn't really sound mechanical... It sorta sounds different now. It's like if a bottle of tic-tacs (or maybe tiny plastic balls.) was on the shelf in front of my woofer. (And you couldn't hear the speaker that was vabrating it....)

When I pull the cone out during play back it stops somewhat. The woofer does not press in from it's natural point at all.

Hi. I am very sorry for you about this, but as I have pointed out several times, this is exactly why I always have the speakers re-coned..and I always have it done by somebody who know how to do it. Better to pay a little and get it done right.

Again, to bad for you.

Rolf
Don C
10-23-2005, 09:31 PM
Analogman's wording is a bit harsh, but I think he's correct about the speakers, It sounds like the cone is not lined up straight after the refoam job. You could start over with another refoam kit, if it is misalignment, it might work. Or something else could be wrong, such as a overheated voice coil, debris in the gap, or something else calling for a recone job.
Jakeisuseless
10-23-2005, 10:16 PM
Kinda what I figured... you guys have to understand. They were fine for a couple weeks. That speaker always sounded a little distored but the alignment was alright. Then out of the blue they were comepletey screwed.

They will play again.... If I have to replace the 122A woofer I will.