Marten Dexter Quartet

Regular price: $60,000.00 USD
Regular price
Sale price: $60,000.00 USD

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Color: Matte Walnut

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Description

The Marten Dexter Quartet is a 3-way floorstander in Marten's Dexter series, sharing its architecture with the Quintet. It combines a diamond tweeter, 3.5-inch ceramic midrange, and 9.5-inch carbon fibre bass driver in an M-Core triple-layer cabinet. The Loaded Reflex Line manages bass via a downward-firing slotted port. Frequency response: 21-45,000 Hz at ±2dB. Jorma Duality wiring standard; Statement Edition adds Jorma Statement and upgraded crossovers. Handbuilt in Mölndal, Sweden.

Specifications

Type: 3-way floorstanding loudspeaker
Configuration: Standard Edition and Statement Edition
Tweeter: 1" Marten pure diamond
Midrange: 3.5" Marten ceramic
Bass Driver: 9.5" Marten carbon fibre
Crossover: Multi-diverse order, 500 Hz and 4,000 Hz
Frequency Response: 21Hz to 45,000 Hz ±2dB
Sensitivity: 89dB / 2.83V
Impedance: 6 ohms nominal (3.8 ohms minimum)
Power Rating: 300W
Terminals: Single-wiring; pure copper, rhodium-plated
Internal Wiring (Standard): Jorma Duality
Internal Wiring (Statement Edition): Jorma Statement
Crossover Components (Statement Edition): Highest quality components
Faceplate: Machined carbon fibre laminate
Cabinet: M-Core triple-layer construction
Bass Loading: Loaded Reflex Line; shaped internal channel with downward-firing wide slotted port
Dimensions (W x H x D): 28–34.3 x 105 x 36 cm / 11.0–13.5 x 41.3 x 14.2"
Weight: 60 kg per speaker
Stand: Mirror polished stainless steel with Marten Isolators (included)
Finishes: True Grain Oak, Matte Walnut, Piano Walnut, Piano Black
Country of Manufacture: Sweden (handbuilt in Mölndal)

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Marten Dexter Quartet

The Marten Dexter Quartet is a 3-way floorstanding loudspeaker and the larger of the two 3-way models in Marten's Dexter series. Where the Dexter Trio and Duo use a ceramic mid/bass driver to cover the midrange and bass together, the Quartet introduces a dedicated 3.5-inch ceramic midrange driver alongside a separate 9.5-inch carbon fibre bass driver, sharing this architecture directly with the flagship Dexter Quintet. The Quartet is available in Standard and Statement Edition configurations, in four finishes, and is handbuilt in Mölndal, Sweden.

The Dexter Series

The Dexter series comprises four models: Dexter Duo, Dexter Trio, Dexter Quartet, and Dexter Quintet. All four share a common platform: the same pure diamond tweeter, M-Core triple-layer cabinet construction, carbon fibre laminate faceplate, Jorma Duality internal wiring, and Loaded Reflex Line bass loading. The Quartet and Quintet are the 3-way models, adding a dedicated ceramic midrange and carbon fibre bass driver to the driver configuration used in the Trio and Duo. Marten states that the Quartet delivers the essential character of the series in a form factor suited to rooms where the Quintet's proportions would exceed what the space calls for.

Cabinet and Faceplate

The cabinet is M-Core triple-layer construction. The faceplate is a machined carbon fibre laminate, shared with Marten's flagship models. Marten Isolators, developed with IsoAcoustics, decouple the cabinet from the floor to reduce resonance transfer.

Standard and Statement Edition

The Standard Edition uses Jorma Duality internal wiring throughout. The Statement Edition uses Jorma Statement internal wiring and highest-quality crossover components. Both versions share the same drivers, cabinet, and bass loading system.

Finishes

The Dexter Quartet is available in four finishes: True Grain Oak, Matte Walnut, Piano Walnut, and Piano Black. True Grain Oak is exclusive to the Dexter series. A dedicated stand in mirror polished stainless steel with Marten Isolators is included.

01
Diamond Tweeter
The 1-inch pure diamond tweeter in the Dexter Duo is derived from development work done on Marten's Coltrane Supreme Extreme project. Its diaphragm moves in pure piston motion beyond the limits of hearing, producing transient response that reflects what is recorded rather than approximating it. This tweeter is shared across all four Dexter models.
02
Ceramic Midrange
A 3.5″ ceramic midrange, designed by Marten, sits at the heart of Dexter Quartet and Quintet. High stiffness and low mass keep it pistonic across its full operating range — the transparency and control it delivers define the tonal character of the design.
03
Carbon Fiber Bass
A 9.5″ carbon fibre cone driver handles the low frequencies in Dexter Quartet. High stiffness and low mass — the combination that keeps the cone pistonic at the frequencies that define bass dynamics and control.
04
Loaded Reflex Line
The Loaded Reflex Line is a new bass loading system developed specifically for the Dexter series. It combines bass reflex and transmission line principles through a shaped internal channel and a wide downward-firing slotted port. The result is reduced air velocity, extended bass depth, and greater flexibility in room placement compared to conventional ported designs. Each Dexter model's bass loading is tuned independently to its driver configuration.
05
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. Internal wiring is upgraded to Jorma Statement in the Dexter Statement models.

How can I book a private listening appointment?

Call or text us at (360) 360-3610, email hello@unveilsound.com, or use our website's contact form. Every appointment begins with a consultation about your current system, room, musical preferences and goals. We then schedule your visit and prepare the space for you.

What equipment can I audition at your studio?

You can audition a selection of reference components from the brands we carry. During your consultation, tell us what you would like to hear and we will confirm availability and create the experience for your visit.

Do you accept trade-ins?

Yes. However, we consider trade-ins case by case, based on the equipment, its condition, and current market demand. Contact us and we will let you know whether we can accept your equipment.

How does the free one-year Trade-Up credit work?

Our Trade-Up Program gives you full store credit for the toward a higher-tier item, for up to one year after your purchase. Some exceptions apply. Items that do not qualify may still be considered as a regular trade-in. For complete terms, please review our Trade-Up Program details.

Can I purchase from Unveil Sound if I live outside the Pacific Northwest?

Yes, we serve clients throughout the United States. Availability of some brands can vary by region, which we discuss during your consultation.

Do you offer delivery, installation, and system setup?

Yes, we can deliver, install, and set up your system anywhere in the United States. For reference-level components, this is included at no additional cost.

View all frequently asked questions

Marten Dexter Quartet

Marten Dexter Quartet

The Dexter Series

Cabinet and Faceplate

Standard and Statement Edition

Finishes

Explore Marten Engineering

Diamond Tweeter

Ceramic Midrange

Carbon Fiber Bass

Loaded Reflex Line

Jorma Duality Wiring

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