# Marten Coltrane Supreme Extreme

Floorstanding passive loudspeaker from the Coltrane series, made by Marten (🇸🇪 SE).

Source: https://truescaleaudio.com/en/speaker/marten-coltrane-supreme-extreme
Manufacturer page: https://www.marten.se/products/coltrane/coltrane-supreme-extreme/

## Dimensions

| Dimension | Metric | Imperial |
| --- | --- | --- |
| Height | 1822 mm | 71.7 in |
| Width | 1000 mm | 39.4 in |
| Depth | 635 mm | 25 in |
| Weight (each) | 410 kg | 904 lb |

Width is the cabinet. Including the plinth or outriggers it spans about 1091 mm (43 in).

## Drivers

- 1 × 25 mm (1 in) tweeter — pure diamond dome, 1" diamond, main tower
- 1 × 76 mm (3 in) midrange — pure diamond dome, 3" diamond high midrange, main tower
- 1 × 178 mm (7 in) midrange — pure beryllium cone, 7" beryllium — Marten says the largest beryllium midrange it has built
- 4 × 203 mm (8 in) mid-bass — Crystalid cone, 8" Crystalid, main tower, two above the driver plate and two below
- 5 × 254 mm (10 in) woofer — aluminium sandwich cone, 10" aluminium sandwich in the separate bass tower, loaded by ten 10" passive radiators

## Specifications

| Specification | Value |
| --- | --- |
| Type | Floorstanding |
| Power | Passive |
| Enclosure | Passive radiator |
| Frequency response | 17–60000 Hz (±2 dB) |
| Crossover | 120 / 370 / 1000 / 4000 Hz |
| Sensitivity | 93 dB |
| Impedance | 6 Ω nominal |
| Price (USD) | $1,300,000 / pair |
| Introduced | 2025 |

## About

Shown at Munich in 2025 and launched in Hong Kong that August, this is two cabinets per channel rather than one. A 30 cm-wide main tower carries the 25 mm diamond tweeter, a 76 mm diamond high midrange, a 178 mm beryllium midrange and four 203 mm Crystalid mid-bass drivers from 120 Hz up; beside it a 70 cm-wide bass tower takes everything below, with five 254 mm aluminium-sandwich drivers and ten 254 mm passive radiators. Both towers are carbon-fibre monocoques with an aluminium and solid-wood sandwich, both stand 182.2 cm, and together they come to 410 kg per side — the dimensions here are the two placed side by side as the press images show them, which is not the only way they can be set up. Every crossover is first order, at 120, 370, 1000 and 4000 Hz. The two towers take their power separately: 600 W for the main, 1000 W for the bass, so there is no single power rating. Marten quotes over 800 hours of hand assembly per system.

## See it to scale

This catalogue draws cabinets at their real size side by side, which no text version can reproduce. Compare the Marten Coltrane Supreme Extreme against another speaker at https://truescaleaudio.com/en/compare?a=marten-coltrane-supreme-extreme