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bd139

  1. 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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