Thank you for all of the Information. Great help
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The B139 is also the woofer in the ESS Transtatic, and is the reason Oscar Heil ended up partnering with ESS for his new driver. He came into the ESS dealer in San Jose (where I heard the Transtatic, and was lusting for), looking for info on how to get some of the woofers, which he wanted to use with the loudspeaker he was working on. The shop put him in touch with ESS, and the rest is history. They didn’t incorporate the B139 in the ESS/Heil speaker, unfortunately (it cost to much to allow the Heil to retail for what they wanted, I believe). I bought a pair of Transtatics in 1982, and the B139 in one of them had been replaced with a generic knock-off. I called ESS, and got the last remaining B139 they had in stock! Still have 'em. |
@caymancayman- If the lead-ins can be repaired; not hard to accomplish. If the voicecoil’s burnt; finding an exact/correct replacement, could be difficult. You might try Bill, at Millersound. Also, there are some used, from around the globe, here: https://www.hifishark.com/model/kef-b-139 and: https://www.ebay.com/itm/KEF-C80-RACE-TRACK-8-X-12-OVAL-WOOFER-TS1212-B/184196571130?hash=item2ae2f89ffa:g:c~8AAOSwl-teXq8V Millersound: http://www.millersound.net/contact-bill-legall-millersound.html These were the go-to guys, for KEF LS3-5A kits and B139s, back in the day. If anyone can offer advice, it’s them: https://www.falconacoustics.co.uk/ Matter of fact, check this out: https://www.falconacoustics.co.uk/drive-units-1/falcon-b110-t27-b139-drive-unit/falcon-b139-8-ohm-kef-b139-sp1044-replacement-woofer.html |
I paid others to rebuild my 15" woofers, then, years later I bought the kit of cone and voice coil, did the job myself, it was a nice accomplidshment. Now there are videos to show how to do it, and you realize, it ain't rocket science. Later, my Velodyne sub 12", foam surround rotted. Cone was fine. I replaced just the surround, even less money, easier. The hard part is getting all the old glue off the outer ring, Simply persistence and the Boy Scout method of always pointing any sharp blade away from your other body parts. |