Coltrane Supreme Extreme: behind the scenes in Tokyo
Before the show opened in Tokyo, we took a slow walk around Coltrane Supreme Extreme — the kind of close-up look we usually reserve for setup. It’s a useful way to understand how the model settles into a room, and it highlights the quieter decisions in the construction and design.
Starting at the front, the proportions of the two towers are immediately clear. The arrangement of the drivers in relation to the wood panel baffle, and the overall geometry all reflect the intention behind the design. Nothing is added for effect; the structure follows the requirements of the system.
Moving closer, the driver array reveals its layout. The pure diamond tweeter sits above the diamond high-midrange, followed by the large beryllium midrange. Below that, the Crystalid units form the mid-bass section. The alignment shows how the first-order crossover has been applied — each driver positioned to integrate naturally with the next.
Above and below the main driver array, Crystalid drivers perform an important role: their combination of low mass and rigidity supports the speed and accuracy needed in the lower midrange. The consistency in finish and mounting reflects the level of care applied throughout the model.
Stepping slightly to the side brings the full shape of the cabinet into view. The transitions between materials and the overall stance of the tower point to the precision of the build. Each surface meets the next cleanly, and the form remains cohesive even from off-centre angles.
On the other side, the bass tower introduces itself. The 10” aluminium-sandwich bass drivers sit in a vertical array, supported at the rear by ten passive radiators. This arrangement allows the bass system to deliver depth and authority with control. The balance between the active and passive elements is part of what gives the speaker its low-frequency capability.
The relationship between the main tower and the bass tower becomes more apparent at distance. Each stands on a stainless-steel frame with Marten Isolators, providing mechanical grounding and reducing external vibration. The spacing and proportions show how the two enclosures work together while maintaining their own roles.
As we circle further around, the curvature of the cabinet becomes more noticeable. The surface shows the precision of the finish, with reflections revealing how refined this material must be to make the grade. It’s here that the accuracy of the construction really stands out — the form is uninterrupted and consistent across the entire height of the speaker.
From the rear, the flow of the cabinet can be traced from top to base. The symmetry and consistency across the back panel indicate how tightly the tolerances are held during assembly. This view also highlights how the two towers compliment each other in scale and proportion.
Up close, the attention to detail in the woodwork becomes clear. Each panel is hand-selected for grain and tone, then matched and joined with care so that the lines run cleanly and evenly. The precision of the fit speaks to the level of craftsmanship involved.
Before returning to the front, the backplate shows the practical engineering behind the design. Custom Marten terminals and Jorma Paragon internal wiring create a direct, reliable signal path. The finishing around the backplate, the alignment of the connectors and the cable routing all reflect the same attention to detail seen throughout the rest of the speaker.
Walking around Coltrane Supreme Extreme like this offers a clear view of how the design comes together — not as a collection of parts, but as a cohesive structure. The materials, the drivers, the joinery and the layout all contribute to the final result, each choice made with purpose.
Find our what happened in Tokyo.