![a pair Kef B139 6171 oval bass driver, Kef, IMF, ESS Transmission line Photo #2200433 - US Audio Mart a pair Kef B139 6171 oval bass driver, Kef, IMF, ESS Transmission line Photo #2200433 - US Audio Mart](https://img.canuckaudiomart.com/uploads/large/2200433-2404e96c-a-pair-kef-b139-6171-oval-bass-driver-kef-imf-ess-transmission-line.jpg)
a pair Kef B139 6171 oval bass driver, Kef, IMF, ESS Transmission line Photo #2200433 - US Audio Mart
![Vintage KEF B139 / 6171 Oval Woofer Bass Driver Made in England / Pair - electronics - by owner - sale - craigslist Vintage KEF B139 / 6171 Oval Woofer Bass Driver Made in England / Pair - electronics - by owner - sale - craigslist](https://images.craigslist.org/00M0M_8H89WpQTxjg_0ve0kM_600x450.jpg)
Vintage KEF B139 / 6171 Oval Woofer Bass Driver Made in England / Pair - electronics - by owner - sale - craigslist
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Kef B139 Passive Pair Woofers | Bass | Speaker Parts | Spare Parts | Others and Accessories | Spring Air
![CAMBRIDGE R50 WEBB ROGERS TL FALCON B139 B110 T27 COLES 4001 DRIVER SET (PAIR) 5% SET DISCOUNT. MADE IN UK. CAMBRIDGE R50 WEBB ROGERS TL FALCON B139 B110 T27 COLES 4001 DRIVER SET (PAIR) 5% SET DISCOUNT. MADE IN UK.](https://www.falconacoustics.co.uk/media/catalog/product/cache/f0142236b583b254474e11e036979e48/c/a/cambridge_r50_drivers.jpg)
CAMBRIDGE R50 WEBB ROGERS TL FALCON B139 B110 T27 COLES 4001 DRIVER SET (PAIR) 5% SET DISCOUNT. MADE IN UK.
![Vintage KEF B139 / 6171 Oval Woofer Bass Driver Made in England / Pair - electronics - by owner - sale - craigslist Vintage KEF B139 / 6171 Oval Woofer Bass Driver Made in England / Pair - electronics - by owner - sale - craigslist](https://images.craigslist.org/00H0H_hh5wNqpeekQ_0ve0kM_600x450.jpg)
Vintage KEF B139 / 6171 Oval Woofer Bass Driver Made in England / Pair - electronics - by owner - sale - craigslist
![Everyone, meet my new girl, (Janie5, SM Labs, lol) Rogers Labs early Summit Elan Series modded with a Kef B139 belly and a phat rear facing Klipsch Tangent Passive inverted surroud 12" Everyone, meet my new girl, (Janie5, SM Labs, lol) Rogers Labs early Summit Elan Series modded with a Kef B139 belly and a phat rear facing Klipsch Tangent Passive inverted surroud 12"](https://i.redd.it/ieqfcfo8zwf51.jpg)