Mårten Design Coltrane loudspeaker
"So what kind of music do <I>you</I> listen to?" I heard myself asking Leif Mårten Olofsson, designer of the Coltrane, Coltrane Alto, Duke, Miles II, Mingus III, and Monk loudspeakers, before I could take it back. The small company, headquartered in Göteborg, Sweden, where Volvos are made, has been building and marketing loudspeakers for the past six years, though Olofsson confesses he's been building them for 30 years, ever since he was 12.