from a Kef Brochure
The KEF B139 was used
in many commercial speakers and in many kits. Some of these include:
Both Bailey's original TL and his later triangulated line, IMF TLS80 & Reference Monitor, Atkinson's State-of-the-Art
TL, the Chris
Rogers Pro9TL, the Webb TL, the Linn Isobaric, the Coffin, and in a number of Kef's speakers ...
Many of these also used the Kef