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-   -   broken SF woofer? (https://www.diyaudio.com/forums/multi-way/139649-broken-sf-woofer.html)

echelonphoto 2nd March 2009 03:55 PM

broken SF woofer?
 
I have a pair of used Sonus Faber Concertinos I bought and i noticed that at higher volumes I would get an occassional crackling out of one of the speakers. I am driving them with a hafler 280XL...so no clipping is evident...I am wondering if the driver is hurting. If so...Is there a successful was to replace this driver and keep the sound coherent...I believe this was produced by scanspeak.

Cal Weldon 2nd March 2009 04:00 PM

Hi,

If the sound is a bit like a scratch then your driver is hooped. You can check it by turning the amp off and pushing in on the cone from the dust cap and listening for the scratchy.

If it is more like a crack, then chances are you are bottoming the coil out on the back plate. Provided you haven't done it too many times, you're probably OK. It means the driver is being pushed too hard.

echelonphoto 2nd March 2009 06:01 PM

Checked it
 
Thanks for the tip...I checked both sides and there doesn't seem to be any problem with scratchiness...of course...it could be a tweeter, but then it would do it all the time. The crackling only happens on the left channel...mostly with loud, fast transients like a orchestral tympani smash.

sreten 3rd March 2009 09:10 AM

Hi,

Swap your left and right speakers, if the problem transfers to the
right channel something may be wrong. Then swap the bass/mid
unit in the two speakers, if it goes back to the left you likely do
have a dodgy driver - seems hard to find any information.

:)/sreten.

inertial 4th March 2009 04:47 PM

Re: broken SF woofer?
 
Quote:

Originally posted by echelonphoto
I have a pair of used Sonus Faber Concertinos ...I believe this was produced by scanspeak.
Hi,

Seas 19 mm silk dome tweeter
Seas 140 mm poly cone woofer

Not sure if they was custom or not for SF:confused:

Cheers,
Paolo

echelonphoto 4th March 2009 05:32 PM

Thanks,

Paulo


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