Hello,
I have 5 pieces of Genelec S30 or S30 NF on my workbench right now to be refurbished.
Electronics basically works, but all midrange drivers (Peerless KO40MRF) and one LF driver have rotten surrounds.
Surrounds for the midrange are easily available, regarding the woofer I post here:
Total I have found in the 5 pieces S30, 3 different woofer types:
Peerless Cat. No.:
830298
831346
and 1x unbranded, looks identical to 830298
The drivers with number 830298 are fine, have a rubber surround. 831346 had a foam surround which has crumbled with age.
Does anyone know if different woofers were simply used during the production period?
I would like to compare the TS parameters and then decide from which side I approach the repair. Does anyone have datasheets? Couldn't find anything in the internet unfortunately.
At the end the speakers should sound as identical as possible. Maybe it makes sense to get a used woofer (with rubber surround) instead of repairing the one with the rotten foam surround, if the parameters differ too much. Drivers look almost the same, but I can not exclude that someone has tinkered around althought the speakers have been in broadcast duty all there life and the technicians there normaly knwo what they are doing
Have contacted the Genelec support, but they stopped support and so far refused to provide any data...
Any help appreciated!
best,
Georg
I have 5 pieces of Genelec S30 or S30 NF on my workbench right now to be refurbished.
Electronics basically works, but all midrange drivers (Peerless KO40MRF) and one LF driver have rotten surrounds.
Surrounds for the midrange are easily available, regarding the woofer I post here:
Total I have found in the 5 pieces S30, 3 different woofer types:
Peerless Cat. No.:
830298
831346
and 1x unbranded, looks identical to 830298
The drivers with number 830298 are fine, have a rubber surround. 831346 had a foam surround which has crumbled with age.
Does anyone know if different woofers were simply used during the production period?
I would like to compare the TS parameters and then decide from which side I approach the repair. Does anyone have datasheets? Couldn't find anything in the internet unfortunately.
At the end the speakers should sound as identical as possible. Maybe it makes sense to get a used woofer (with rubber surround) instead of repairing the one with the rotten foam surround, if the parameters differ too much. Drivers look almost the same, but I can not exclude that someone has tinkered around althought the speakers have been in broadcast duty all there life and the technicians there normaly knwo what they are doing
Have contacted the Genelec support, but they stopped support and so far refused to provide any data...
Any help appreciated!
best,
Georg
Normally fs decreases by a serious amount if rubber is used instead of foam, at least this is what i learned from old peerless datasheets of other drivers which they offered in both versions. thats why i am not sure if everything is 'correct' or somebody put a drive in with the same visual appearance ...
Can it be the rubber surround Peerless woofer has a poly instead of a paper cone?
Here is the replacement surround for the foam ones. https://www.repairyourspeakers.com/...amrand-van-originele-fabrikant/a-640-20000047
Here is the replacement surround for the foam ones. https://www.repairyourspeakers.com/...amrand-van-originele-fabrikant/a-640-20000047
The cones look and feel the same. Not sure how to find out.
Thanks for the link - I already found that Webshop but didn't order because I am not sure if foam/rubber makes a difference. They also have the surrounds for the mf driver. maybe I should stop thinking about it and just order the surrounds from there.
Thanks for the link - I already found that Webshop but didn't order because I am not sure if foam/rubber makes a difference. They also have the surrounds for the mf driver. maybe I should stop thinking about it and just order the surrounds from there.
A large Fs shift due to surround material difference alone is atypical. Typically the Cms is dominated by the spider which is much stiffer than the surround. For midranges, where high frequency modes can matter the surround material can make more of a difference since it changes the boundary conditions (at the cone edge termination). But for a woofer surround material doesn’t make a huge difference.
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