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b139

  1. K

    Kef Concerto bass driver rattling sound

    Hello everyone, I was having my daily music session until I discovered a weird rattling sound on both the bass drivers. These are the Kef B139 drivers. The sound appears at louder volumes. I did a quick check to see if there was any rubbing of the voice coil against the magnet, but I didn’t hear...
  2. R

    Repairing Kef B139 SP1044 Woofers

    I've found that the glue between the spider and the middle cone has deteriorated and resulted in a total separation. The spider is still in great shape so I don't really want to replace it. However, there is still a fair amount of old glue left on it. The way I see it, I have 3 options: 1...
    • revinyl
    • Thread
    • b139 concerto deteriorated glue kef reglue removal repair sp1044 spider
    • Replies: 15
    • Forum: Speakers
  3. Longaevus

    KEF BD139 re-foam or replace?

    As far as I am aware there are no oval surround rubber/foam kits available. I am also aware there were different variations of this passive radiator such as the "missing-D" model, the B139. Should I look for a pair of these? Are they interchangeable, spec wise? Am I wrong and the surrounds on...
    • Longaevus
    • Thread
    • b139 bd139 kef passive radiator replace
    • Replies: 3
    • Forum: Speakers
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