🇺🇦 We stand with Ukraine! 🇺🇦

ADVANCED -TRANSITION HORNS
by Marcel Batík










Where Math meets the Art



High-performance acoustic horns & waveguides for sound reproduction

The latest designs available:

ATH Gen2 Waveguides
Gen2 - long adapters for BMS drivers

A460D / true constant-directivity waveguide
Tritonia Waveguides



All STL kits via Cults

Work on horns:
[1]OS-SE Waveguide (pdf)
Novel profile formula for baffle-mounted horns, 2020.
[2]R-OSSE Acoustic Waveguide (pdf)
New parametric formula for low-diffraction, free-standing horns, 2022.
[3]Spherical Wave Forming (pdf)
Apparatus for flat-to-spherical wavefront transformation for constant directivity, 2021.
[4]Extended-Throat Waveguides
Technical Note, 2023.
[5]EXAR Waveguides - Segmentizing a horn
Analytic method of separation of axisymmetric horns into segments, 2024.

Associated diyAudio threads: Theory & Design | Practicalities
Interactive waveguide formulas in Desmos calculator: OSSE | R-OSSE






Free ATH software (zip package, the latest release)
User Guide

No support provided.

The latest web update: February 2025