Marten has just launched its newest loudspeaker range, the Dexter — and it’s now part of the Hidden Home Technology collection. It broke cover at the High End show in Vienna, and it brings technology that until now lived much further up Marten’s range within reach of a far wider set of rooms and budgets.
Marten is a Swedish loudspeaker maker with a long-standing obsession: get the speaker out of the way so you hear the recording, not the cabinet. They build by hand in Sweden, favour exotic driver materials — ceramic, carbon fibre and diamond — and design for very low distortion. The Marten Dexter is the range where several of their most serious ideas finally meet at a more attainable price.
Where the Marten Dexter sits
In Marten’s line-up the Dexter slots in just above the Parker range, below the flagship Mingus and Coltrane models. Think of it as the point where Marten’s reference-grade engineering becomes genuinely attainable. Crucially, it is the first Marten range built around the company’s pure diamond tweeter — a part previously reserved for the cost-no-object Coltrane.
What’s actually new
A pure diamond tweeter
The tweeter is the small driver that produces the highest frequencies. Marten makes its dome from pure diamond — about the stiffest material there is — so it can move without flexing or “ringing”. In practice that means treble that stays detailed and airy without ever turning hard or harsh. Diamond tweeters are rare and expensive; finding one in a range at this level is unusual.
The M-Core cabinet
A speaker cabinet should be heard as little as possible — every time the walls of the box vibrate, they add a sound of their own. The Dexter uses Marten’s new M-Core cabinet: a three-layer construction engineered to absorb and suppress those vibrations, so the music comes from the drivers and not the box.
“Loaded Reflex Line” bass
Getting deep, tuneful bass out of a slim cabinet is one of the hardest things in speaker design. Marten’s answer on the Dexter combines two established techniques — a reflex port and a transmission line (a long internal channel that reinforces the low notes) — into a single hybrid system with a wide, downward-firing slot. The result is bass that goes low and stays tight, from cabinets that still look elegant in a real room.
Every Dexter is wired internally with Jorma Duality cable and hand-built at Marten’s factory in Sweden.
The four models
There are four Dexters, sharing the same diamond tweeter and design language but scaling up in size, bass capability and price (all prices inc VAT, from):
- Dexter Duo — a two-way stand-mount (a compact speaker designed to sit on stands), ideal for smaller rooms. From £20,995.
- Dexter Trio — a slim 2.5-way floorstander, the natural starting point for most rooms. From £32,995.
- Dexter Quartet — a full three-way floorstander, adding a dedicated midrange driver and a carbon-fibre bass unit. From £42,995.
- Dexter Quintet — the flagship of the range, a three-way floorstander with twin carbon-fibre bass drivers for the largest rooms. From £49,995.
Each model is offered in four finishes: True Grain Oak, Matte Walnut, Piano Walnut and Piano Black.
The Statement Edition
Every Dexter can be specified — or later upgraded — to Statement Edition, which adds Jorma’s top Statement internal wiring and an upgraded crossover for a step up in resolution and dynamics. If you already own a Dexter, the upgrade can be carried out as a retrofit by Marten in Sweden, so you don’t have to change speaker to move up.
Hear the Marten Dexter in Bath
Specifications only tell you so much; a speaker like this is best understood by ear. We’d be glad to set up a private demonstration in our Bath listening room — get in touch to arrange a session and hear what Marten’s latest can do.
We heard the Dexter at its launch at High End Vienna 2026, and it was one of the standout rooms of the show — you can read Daniel’s impressions straight from the floor in our High End Vienna 2026 highlights.
