In 1952 Kloss together with Edgar Villchur co-founded the audio equipment manufacturing company Acoustic Research Corporation (AR). Together they developed the AR Model 1, which was the first commercial acoustic suspension loudspeaker.
Kloss began his custom of eponymous products by lending his last name's initial to KLH as a founder in 1957, together with Malcolm Low and J. Anton Hofmann who had also been investors in AR. At KLH, Kloss continued to build speakers such as the classic KLH Model 5 and 6, and produced one of the first small FM radios with high selectivity, the Model 8.
In 1988 he founded the company Cambridge SoundWorks, which was quite successful, producing aplenty of different models ranging from the table radio of Kloss's companies to high quality speaker systems for computers. Kloss left Cambridge SoundWorks in 1996.
Kloss continued to work on other projects such as the now available PAL when he died in 2002.