Floorstanding loudspeakers — Marten Design Coltrane Quintet Extreme

The Coltrane Quintet Extreme is a flagship floorstanding loudspeaker from Marten Design, a Swedish manufacturer known for its materials and driver engineering. Named after jazz musician John Coltrane, in line with Marten's tradition of naming flagship models after celebrated musicians, it is a further-refined edition within the brand's Coltrane series.

Key specs that matter

Rated response is 18Hz to 60,000Hz within plus-or-minus 3dB, reaching into infrasonic territory at the bottom and well beyond the conventional audible range in the treble. Sensitivity is 89dB into a 4 ohm load, with recommended amplifier power specified at 350W. Each speaker measures 52.5 x 127.9 x 78.8cm and weighs 115kg.

Sound and use context

Expect high resolution across a wide bandwidth, from the deepest bass fundamentals to fine high-frequency harmonic detail.

Pairing

The 4 ohm impedance and 350W recommended power call for an amplifier with strong current delivery and headroom.

Alternatives

Marten Design's other Coltrane series models, below this Extreme edition in refinement and price, share the same core engineering at a lower budget.