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eTrak

Elliptical tractrix horns made from solid wood — CNC-machined, repeatable, mechanically inert.

eTrak is LMH’s elliptical tractrix horn line.
It combines the acoustic strengths of classic tractrix profiles with an asymmetric, elliptical geometry, delivering a wider sweet spot and more even coverage across larger listening areas than conventional round horns.

Pricing & Lead Times
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eTrak horns are designed for demanding DIY, OEM, and system projects where uniform dispersion beyond the primary listening position is required — not only on-axis, but also laterally within the room.

The elliptical tractrix geometry combines the strengths of classic tractrix contours with controlled directivity across two axes. This results in a wider, more even sound distribution and a significantly enlarged sweet spot — particularly advantageous in living spaces, studios, and multi-listener environments.

Typical applications for eTrak include:

  • Mid/high frequency sections in 2- or 3-way systems with an extended sweet spot

  • Studio monitors with even energy distribution

  • Hybrid loudspeakers with precise yet non-aggressive directivity

  • High-end systems focused on spatial stability across multiple listening positions

Compared to rotationally symmetric horns, eTrak does not prioritize maximum on-axis directness.
Instead, the focus is on balance, room compatibility, and stable imaging across a broader listening area.

Download test report / data sheet (PDF)

  • Controlled directivity across two axes

  • Stable detail reproduction into high frequencies

  • Even energy distribution within the room

  • Low acoustic artifacts thanks to a resonance-minimized wooden structure

  • Flexible driver interface options

  • CNC-precision machined

  • OEM configuration available

Acoustics & Geometry

With the eTrak profile, a natural, clear, and low-resonance reproduction is achieved, extending cleanly well beyond the audible range — provided appropriately matched drivers are used.

The elliptical form delivers an approximately 15% larger sweet spot compared to classic tractrix horns such as KWH-type designs, allowing for more flexible listening positions.

Material & Manufacturing

Like all LMH horns, eTrak horn bodies are manufactured from high-quality beech or birch multiplex (knife-veneered, biologically bonded) and machined on a specially developed high-performance CNC system.

This is followed by manual post-processing and careful surface sealing.

Integration & Interface

  • Integrated adapter plate for driver mounting → no cross-section discontinuities

  • Interface options: 1″ / 1.4″ / 1.5″ / 2″ (special drivers available on request)

  • Variants for flush mounting or external installation

  • Easily combined in 2- or 3-way systems or fullrange-assisted designs

Woods & Finishes

Structural Wood

sTrak horns are based on dimensionally stable beech or birch multiplex.
This material offers uniform density, high dimensional accuracy, and excellent mechanical damping — essential for a mechanically calm horn body without unwanted structural resonances.

For rotationally symmetric horns, multiplex is structurally superior, as it absorbs internal stresses in a controlled manner and remains dimensionally stable even under changing climatic conditions.

Solid wood is available for project-specific applications at any time.
For this purpose, we have built a dedicated sourcing network over many years to ensure the highest material quality.

Surface & Finish

Hardwax oil (standard)
Open-pore, honest, acoustically unobtrusive

Stain (optional)
Color accentuation while preserving the natural wood structure

Lacquer finish (on request)
Only when clearly required by the project

No foils.
No veneer simulation.
No industrial surface make-up.

At LMH, the surface is part of the construction — not decoration.

Variants

Standard / Add-on Version

Free-standing or cabinet-mounted

Flush-Mount Version

Flush integration into baffles

Easy Integration & Flexible Alignment

Various stand and mounting solutions with three-dimensional adjustability enable flexible and precise alignment.

Sizes

Our eTrak horns are available with mouth diameters ranging from 14 cm up to 120 cm.
Custom sizes are available at any time.

View available sizes

eTrak – Available Sizes & Technical Specifications

Version (width) Approx. depth with 1″ Approx. depth with 2″ Lower cutoff frequency (Cf) Approx. weight (beech multiplex)
eTrak 14 12 cm 7 cm 1000 Hz 1 kg
eTrak 20 17 cm 12 cm 750 Hz 2 kg
eTrak 30 28 cm 20 cm 550 Hz 5 kg
eTrak 40 38 cm 29 cm 350 Hz 9 kg
eTrak 50 50 cm 40 cm 300 Hz 14 kg
eTrak 60 59 cm 45 cm 270 Hz 22 kg
Not sure? Get driver-matching advice…

Prices

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