Dexter Duo
Nothing between the listener and the music.
Technology earned, not borrowed.
Dexter Duo is a 2-way stand speaker and the entry point to the series — one that makes no concessions in the elements that matter most. The same diamond tweeter found in every Dexter model. The same M-Core cabinet. The same approach to bass loading. What changes is scale; the intent is constant.
Diamond and ceramic, resolved as one design.
A diamond tweeter and a ceramic mid/bass driver, each designed by Marten. Around them, every element — cabinet, crossover, bass loading — developed to the same standard as the rest of the series. A triple-layer cabinet built to remove resonance from the equation. A crossover resolved individually for the drivers it serves. A bass loading system that delivers controlled output with minimal distortion. The integration is the design.
The tweeter is diamond. Not as an option. Not as an upgrade. It was the starting point for every design decision that followed.
The engineering is present in every detail.
You simply cannot hear it.
Features
Diamond tweeter
The hardest diaphragm material available, with a stiffness-to-mass ratio no other material matches. Pistonic motion beyond the audible range — vanishingly low distortion, transient response that reflects what is recorded rather than approximating it.
Ceramic mid-bass
A 7.5″ ceramic mid/bass driver, designed by Marten, handles everything below the tweeter in Dexter Duo. High stiffness and low mass keep it pistonic across its operating range — delivering the transparency and control that define the series.
Multi-diverse crossover
A custom crossover developed specifically for Dexter. Each order and transition point is resolved individually — not as a compromise between constraints, but as a deliberate choice for the drivers it serves.
Bass loading
The Loaded Reflex Line manages bass through a shaped internal channel that exits through a wide downward-firing slot. Reduced air velocity. Controlled, extended output. Greater freedom in placement than the cabinet’s footprint might suggest.
Jorma Duality wiring
Jorma Duality, handmade in Sweden. Ultra-pure copper conductors forming a direct signal path from crossover to driver. Standard across every model in the series.
The speaker disappears.
The music does not.
Marten Isolators, developed with IsoAcoustics, substantially decouple the cabinet from the floor — reducing resonance transfer and opening the soundstage. The cabinet is M-Core triple-layer construction, with a carbon fibre laminate faceplate surrounding the tweeter.
Four finishes,
hand-applied.
Four finishes, each expressing the same design in a different material. True Grain Oak — new to Marten and exclusive to the Dexter series — retains the natural texture of the wood, tactile in a way that is particular to this finish. The matte veneers are hand-sanded and sealed. The piano finishes are built up through multiple lacquer layers and polished to depth.
Dexter Duo
| Configuration | 2-way |
| Tweeter | 1" Marten pure diamond |
| Mid/Bass | 7.5″ Marten ceramic |
| Crossover | Multi-diverse order, 2,000 Hz |
| Frequency response | 35–45,000 Hz ±2dB |
| Sensitivity | 88dB / 2.83V |
| Impedance | 6 ohms (3.6 ohms min) |
| Power rating | 200W |
| Terminals | Single-wiring, pure copper rhodium-plated |
| Internal wiring | Jorma Duality |
| Cabinet | M-Core triple-layer |
| Dimensions W × H × D | 22–27 × 43 × 38 cm 8.7–10.6 × 17 × 15″ |
| Weight | 18 kg |
| Stands | Matte Black with mirror polished Marten Isolators (optional) |
| Finishes | True Grain Oak · Matte Walnut · Piano Walnut · Piano Black |
| Internal wiring | Jorma Statement |
| Crossover | Highest quality components |
Handbuilt in Mölndal, Sweden.