Since 2003 Marstrom Composite has been supplying Marten with carbon fiber cabinets for the Coltrane series. The Coltrane 3 is the original model, now in its third iteration does it impress on the high-end listeners all around the world. www.marten.se
The series has expanded during the years and consist now of three different models. Coltrane was the first loudspeaker to benefit from a carbon fiber cabinet.