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Big @ss subwoofer in Wisconsin / Kef B-139 driver | Page 2 | Audiokarma Home Audio Stereo Discussion Forums
KEF transmission line project | DIY Audio Projects
High end Audio KEF Reference 104 Series project. 4 oval subwoofers (4 x B139 6171) - YouTube
KEF Electronics, Ltd., was the first loudspeaker company to use computer aided design. The KEF RAM400 had a bex… | Vintage speakers, Loudspeaker, Speaker box design
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KEF B139 SP1044 "Race Track" bass drivers PAIR Photo #2318844 - US Audio Mart