The N°3 is the most powerful model of the N-Series: a large-scale two-way horn loudspeaker system designed for large rooms, long listening distances, high level stability, and maximum control under real-world operating conditions.

• System: two-way design with large-format mid/high-frequency horn (~700 mm) and 15″ Concentric bass concept

• Crossover: approx. 300–400 Hz (model-dependent)

• Efficiency: >96 dB / 1 W / 1 m

• Operation: active (bi-amped)

• Designed for large living spaces, studios, and dedicated listening rooms with high level demands

The N°3 is built on a project-specific basis and is available in two technically distinct editions.
Both variants share the same large-format horn and low-frequency concept, but differ in their mid/high-frequency operating principle.

At the core is a very large-format mid/high-frequency horn (~700 mm):
Its size significantly relieves the driver at high sound pressure levels, reduces acoustic compression, and increases dynamic headroom — while maintaining controlled, reproducible directivity, even at high levels and long listening distances.

N°3 · 2″ DK Edition

• 70 cm sTrak wooden horn with 2″ compression driver

• very high efficiency

• maximum level stability and controlled directivity

• classic horn design for long listening distances

N°3 · 6″ BB Edition

• 70 cm sTrak wooden horn with 6″ cone full-range driver

• broader midrange coupling

• alternative tonal balance with the same level of system control

• tuned on a project-specific basis

The 15″ low-frequency driver operates in an LMH Concentric-B bass reflex system with a symmetrical enclosure layout and central port geometry.
The symmetrical structure ensures uniform pressure distribution, reduces enclosure resonances, and enables precise, controlled low-frequency reproduction, even at high sound pressure levels.

The low-frequency system is specifically matched to the radiation behavior of the large-format horn, ensuring coherent energy distribution across the crossover region.

A resonance-optimized, mechanically decoupled suspension separates the horn, low-frequency enclosure, and supporting structure in order to minimize structure-borne noise and mechanical feedback — a key prerequisite for mechanical stability and level consistency under high load.

The crossover frequency is set at approximately 300 Hz, placing it almost entirely outside the critical range of human vocal reproduction.
Thanks to the large horn size and the symmetrical low-frequency radiation, directivity in the crossover region remains stable and controlled, even at long listening distances and high sound pressure levels.

For the N°3, active (bi-amped) operation is recommended.
In the active configuration, a DSP-based crossover allows precise adjustment of crossover behavior, level, and time alignment to suit the room, listening distance, and desired target response.

All acoustically relevant components are manufactured or inspected in the LMH workshop.
CNC-machined horns, mechanically stable enclosure geometries, and defined wall thicknesses minimize self-resonances and ensure reproducible results.

Measurements are carried out on a project-specific basis and serve final system optimization, including frequency response (on/off-axis), directivity, impedance, and distortion.
Measurement data can be provided on request.

The N°3 is designed for very large rooms, long listening distances, and sustained high sound pressure levels.
The following specifications are provided for technical reference and planning.

Drivers & acoustics

• Mid / high frequency: 70 cm wooden horn

• Optional configurations:

  • 2″ compression driver (DK Edition)

  • 6″ cone full-range driver (BB Edition)

• Low frequency: 18″ neodymium driver in an LMH Concentric-B bass reflex system

• Symmetrical low-frequency enclosure with central port geometry

Electrical data

• Sensitivity: >96 dB / 1 W / 1 m

• Nominal impedance: 8 Ω

• Recommended amplifier power: from approx. 5 W suitable for meaningful operation

Dimensions & weight (typical)

• Height: approx. 185 cm

• Width: approx. 80 cm

• Depth: approx. 95 cm

• Weight: approx. 120 kg per loudspeaker

The N°3 is the most mechanically and acoustically uncompromising system of the N-Series.
Material selection and surface finishes serve one purpose only: maximum structural calm, long-term stability, and unaltered acoustic working conditions.

The enclosure is based on a heavily dimensioned beech plywood (multiplex) structure, designed for mass, stiffness, and reproducible resonance behavior.
With the N°3, appearance is always secondary — surface follows structure.

Hardwax Oil (standard)

• Clear hardwax oil, open-pored and materially honest

• Emphasizes volume, edges, and natural wood structure

• Acoustically completely uncritical

• Long-term stable, repairable, without sealing layers

This is the preferred and recommended finish for the N°3, as it makes the system’s monolithic character clearly visible.

Clear Lacquer (optional)

• Satin clear lacquer with minimal gloss level

• Increased mechanical protection with a technically calm layer structure

• Suitable for heavily used environments or clearly defined design requirements

The clear lacquer serves surface protection only — not visual staging.

Stain & Color Options (project-based)

In principle, the N°3 follows a reduced, material-focused aesthetic.
On explicit request, however, bold and expressive colors are also possible — as a conscious design decision, not as an effect.

• Transparent or opaque color finishes in strong, saturated tones

• Technically calm execution, matte or satin

• Color selection always coordinated on a project basis with room, lighting, and overall architecture

Even with intense colors, the execution of the N°3 remains strictly functional:
no high-gloss effects, no decorative embellishments — only clear surfaces, clean edges, and a mechanically calm structure.

RAL Lacquer (on request)

A full lacquer finish in nearly all RAL colors is possible, provided it suits the architectural and functional integration of the system.

• Matte or satin execution

• Multi-layer, mechanically stable lacquer build

• No effect-driven or high-gloss surfaces

For the N°3, RAL lacquer is a deliberate option, not the default.

Material & Construction Logic of the N°3

• Beech plywood in high wall thickness as the structural base

• Surfaces as protection and material emphasis — not decoration

• Maximum reduction to function, mass, and mechanical calm

The N°3 is not a design object.
It is an acoustic tool with physical presence.