ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
Hi all,
I have recently come into possession of a rather old Beomaster 900 and a couple of Beovox 1000 speakers, that had unfortunately spent many years in less-than-ideal storage. The system works great after some cleaning and minor recabling, but one of the Beovox speakers has a fault that causes it to 'buzz' when playing low frequencies.
My initial thought was to check for a tear in the speaker cone, but upon inspection I could not find anything obvious. Do any of you have any suggestions about what could be causing the buzzing, or alternatively as to where I could find a replacement speaker?
Many thanks!
Wonderful classic system !
Probably a lose winding in the woofer coil but could be other things;Take off the front grill, take out the woofer and inspect for eventual leads touching thecone from behind. Push the cone in and out a little, gently, using your fingers and listen/feelfor scraping noises.I may be able to find a good used original woofer if you need.
Martin
Hi Martin,
Thanks for your reply. I had another look, couldn't see any loose wiring (although if I'm honest I'm not 100% sure what to look for!) but I did notice the scraping noises you mentioned when pushing the cone in and out, a little like ripping sellotape off a carpet (?!). Any idea whether that can be salvaged?
Thanks,
Jack
Try the old trick of turning the woofer 180 degr and screw it back again.
I agree with Martin, it does sound like a coil winding fault which would be impossible to see but can be felt. I had these exact symptoms with a woofer on a different Beovox speaker. The fault was more noticable the less hard the speaker was driven. It was the binding tape on the coil which had "bubbled" causing it to rub as the cone moved. I had to totally disassemble the driver & sand off the tape back to its original shape/thickness. It was a real pain to do & I only attempted it as an exercise to see if it was possible. It was, but involved quite a bit of lateral thinking & searching my "man drawer" for suitable bits & pieces which could be adapted as tools for the job!
I wouldn't recommend it as a viable fix for your speakers as I'm sure it would make far more sense to take Martin up on his offer of a replacement driver or even buy another pair off ebay for what they cost. What I did is really not worth the effort on anything but the rarest speakers to be honest but was fun in a masochistic way
I doubt if it is anything wrong with the crossovers but this can be easily proved/disproved by swapping the drivers over & see if the fault follows the driver - which it probably will.
Chris.