TDL
Company profile
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The company TDL emerged from the company IMF. IMF was an absolute top class product in the 70s.
TDL MONITOR ca. 1988 Transmissionline technology taken to the extreme.
Also available as a do-it-yourself kit under the name TDL Monitor Compact. Very good test ratings in German HIFI magazines. Axel Oberhage was responsible for the German distribution. Some spare parts are still available through him. See AOS www.aos-lautsprecher.de