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
Hello, all.
I got a pair of Beovox P50, but the bottom loudspeaker of one of them is seriously damaged. The magnet was out of place and the coil is cut and scrambled up. What do you think would be easier, to try and find a new woofer or just try to recoil and refoam the old one? And if so, where can I find rubber refoams? These generally available ones don't convince me that much, as they do not have the same flexibility. If not, does anyone know who was the manufacturer of these woofers and, possibly, its commercial reference?
Thank you for reading.
Welcome to Beoworld,
member 'Dillen' did have some original replacements available a while ago (I bought a few for mine), he may have one or two remaining. I'm not sure that originals are widely available anymore. Hopefully Martin (Dillen) will chip in with some help.
If you're skilled enough you could try to rebuild it. A quick search found this from Beophile.com:
'The two bass units were 8-ohm units from Peerless, marked 820809, and the tweeter was a SEAS H086, 25mm, 4 ohm, the same type as used in the Beovox M70. The phase-link unit was also from SEAS, the 10F-M'.
There are plenty of producers of replacement surrounds, foam and rubber. Google search or even search within Beoworld for options.
Dave.
Hello all,
Yesterday I bought a pair of Beovox P50's. During the listening session with the seller it turned out that one of the woofers had the moved magnet problem. No worries he told me, as he had repaired another woofer 5 years ago using a completely new approach.
Harry from Hillegom - the seller - had developed a method that is in my eyes both simple and elegant. The looks may be less, but choosing between throwing away a woofer or bring it to full life again with a minimum of tools and costs is for me a simple choice.
The next steps outline the approach:
Step 1: Remove the magnet from the driver frame.
We did this by clamping the magnet in a Black&Decker Workmate and lifting of the frame by using two woode levers on both sides of the frame.
Step 2: Make a pvc ring that tightly fits the magnet base on the frame
We took a tube that had a too large diameter. We sliced a ring (using a miter saw applying only light pressure) of about 4mm high. We made the ring fit tightly buy removing a piece of the ring and bending it tightly securing it with ducktape. We made sure is was even or a bit below with the magnet attachment surface of the speaker frame
Step 3: Make the magnet fit and move (tight fit necessary!) within the tube by applying heat (paint stripper) and pressing the magnet through the tube. As we did this process not too gentle, the yoke and magnet disassembled (glue failure). This does not change the process, but please be warned that the parts are not firmly glued anymore,
Step 4: Fit PVC tube over the PVC ring on to the frame
We fitted the tube containing the magnet (and yoke if still attached to magnet) to the frame. We checked if the tube fitted the ring tightly. As we were not satisfied during the first try, we applied one winding of ducktape to the outer side of the ring. Then the tube fitted tightly.
Step 5 is only necessary if you were so unlucky as to desintergrate the magnet/yoke assemby
In this step we fitted the yoke using an additional center ring.
And the final assembly
At this point it turned out that the voice coil was stuck. However, by gently wrenching the yoke using a small screw driver, we eventually found a position where the voice coil was moving freely. Then the seams were filled with epoxy to fix that position of the yoke on the magnet.
As a previous repair on another Peerles woofer suffering from a moving magnet functioned flawlessly for 5 years, we expect this solution to be a once in a lifetime solution for Peerless woofers of any type for all Beovox models
This is the tube Harry and me used for the repair. It is glasfiber protection tube used in the Netherlands.
The measures of the tube are:
outer diameter : 75.0 mminner diameter : 70.0 mmthickness of tube: 2.5 mm
The tube below is an example of the tube we used, although with slightly different specs