IMF TLS80 Transmission Line Monitor circa 1978 The IMF TLS80 was considered one of the finest speakers available in its day. It utilized the venerable Kef B139 in a transmission Line loaded enclosure. Descended from the Radford speakers, IMF was one of Irving "Bud" M. Fried's successes. When Bud left England for the USA (politics they say), IMF morphed into TDL which makes TL speakers to this day and Bud started building Frieds. The speaker compliment is: Kef B139 woofer Kef B110 mid Coles 3000 tweeter Coles 4000 super tweeter
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