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  • Re: Beovox S120

    After four applications of Danish Oil with the final one applied with an ultra fine abrasive pad, I have a satin finish that shows the veneer matched cabinets well. The sound of these is utterly different to my more coloured S55 Beovox. The S120s are transparent, accurate and more present for a given volume setting. Bass is certainly not absent. I notice a very slight tendency to shrillness. Recorded piano sound is always a good test, and these pass. The spoken voice is another good test, and I'm
    Posted to The Workbench (Forum) by Krolroger on Sun, Jun 30 2019
  • Re: Beovox S120

    The S120 is a bass reflex speaker and the reflex port is at the bottom of the cabinet shown here. I thought conventional wisdom has it that the enclosure shouldn't contain too much sound deadening or the reflex function will fail to work. Also, peculiarly, the gasket sealing the resin loudspeaker plate to the cabinet only extends a short way down the sides of the enclosure.
    Posted to The Workbench (Forum) by Krolroger on Tue, Jun 25 2019
  • Re: Beovox S120

    Gents, thank you for your input. Neutral is what I like. I have recapped the crossovers. Reichelt Elektronik is a good source for these TREC branded bipolar audio caps at around €1 each but it remains to be seen (heard) whether I end up reinstalling the old Roederstein 'golden bullets' which are still perfectly within spec. Recapping crossovers is one of those articles of faith that deserves to be challenged. Now onto the rosewood cabinets. A bit of sawdust and superglue makes a good
    Posted to The Workbench (Forum) by Krolroger on Fri, Jun 21 2019
  • Re: Beovox S120

    And the dustcap back in place.
    Posted to The Workbench (Forum) by Krolroger on Sun, Jun 16 2019
  • Re: Beovox S120

    The foam in the centre of the pole piece underneath the dustcap is pretty fragile after nearly forty years. I gave some thought to replacing it with some similar open cell foam, but decided against. Not sure what it does. I used three 0.1mm shims cut from acetate sheet to centre the cone. However, on both speakers, the cone is not exactly concentric with the basket which involved slightly offsetting the new surround.
    Posted to The Workbench (Forum) by Krolroger on Sun, Jun 16 2019
  • Re: Beovox S120

    There must be any number of enthusiasts who refoam speakers to a high standard, but I thought I'd share my method (might be useful to somebody) as the S120 woofer is slightly harder to repair than its lesser brethren on account of the size of the voice coil and consequent steep angle of the cone. This makes concentricity slightly harder to achieve. I use pins (with the blue flag) stuck through the foam to enable alignment of the edge of the cone with the new surround. Small neodymium magnets
    Posted to The Workbench (Forum) by Krolroger on Tue, Jun 11 2019
  • Beovox S120

    To answer Nick's earlier question, this is my next project, a refoam and crossover recap on a tidy pair of Beovox S120. This is obviously a high quality woofer (8 ohm) with a cast aluminium basket, a whopping great magnet and some weight to it. Can anyone tell me who made it?
    Posted to The Workbench (Forum) by Krolroger on Sun, Jun 9 2019
  • Re: Beomaster 4000

    I removed the old finish with acetone. After several coats of Danish Oil later, the rosewood has come up nicely. One day, I'll get a rabbit's ear aerial with two unbroken dipoles...
    Posted to The Workbench (Forum) by Krolroger on Mon, May 27 2019
  • Re: Beomaster 4000

    Note the faked up voltage selector (doesn't rotate). The fuse ratings are stated inside the fusebox door.
    Posted to The Workbench (Forum) by Krolroger on Mon, May 27 2019
  • Re: Beomaster 4000

    I've now finished this project and here are some final pics. I found crimped closed end connectors useful for wiring in the transformer connections. This enabled the wires neatly to double back on themselves rather than round in loops. There is a small amount of capacitative coupling into the metalwork of the Beomaster. As the plug is polarised, I will live with it.
    Posted to The Workbench (Forum) by Krolroger on Mon, May 27 2019
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