In 1997, Koch started to work with Eden Electronics USA as Koch’s distributor in the US. At the same time, production of the KB2500 bass head ceased and the design was modified to Eden’s specifications. As a result, the Eden VT300 all-tube bass head was born which was designed and built by Koch in The Netherlands and assembled & tested by Eden
I wanted my first amp to be a 'definitive best' type of product regardless how large the market would be for it. Dolf is a brilliant designer and his manufacturing is superb. I designed the SA200 in terms of the aesthetics and features and directed Dolf in regard to what I was hearing in my head. Dolf did the actual amplifier design and is manufacturing the SA200.