5426 Multicell Horn 3x4

This 3x4 multicellular horn (12 cells) is engineered to provide constant directivity and smooth, homogeneous sound dispersion. Its modular 2-piece design enables easy printing on standard build volumes while maintaining structural rigidity and acoustic decoupling.

GEOMETRY & ACOUSTIC EXPANSION

• Multicell Matrix: 12 independent cells (3 rows x 4 columns). This partitioning maintains controlled coverage across both horizontal and vertical axes, preventing high-frequency beaming.

• Expansion Profile: Calculated using exponential / Tractrix acoustic expansion formulas to optimize acoustic loading, extend low-end response, and minimize internal diffraction.

• Throat Adapter Transition: Smooth interior transition geometry bridging the circular driver exit to the 12-channel 3x4 cell matrix.

• Modular Assembly: Separated into two main components joined by bolted flange mounts:

  • Throat entry adapter with threaded driver mount and rear support foot.

  • Main 3x4 multicellular horn body with integrated mounting tabs at the mouth base.

TECHNICAL SPECIFICATIONS

• Horn Type: Multicellular 3x4 (12 individual cells)

• Driver Mount Thread: Standard 1-3/8" - 18 TPI female thread (STEP base file for easy modification to adapt to your specific drivers.)

• Inter-element Mounting: Bolted flange connection using M6 hardware

• Chassis Support: Integrated mounting feet on both throat adapter and horn mouth for stable enclosure installation

• Dimensions: 350 x 350 x 300 mm

• Included Files: STL and STEP

3D PRINTING RECOMMENDATIONS

• Material: PETG recommended for mechanical toughness, temperature resistance, and acoustic damping properties (PLA is also suitable).

• Layer Height: 0.16 mm to 0.20 mm (crucial for clean, precise 1-3/8"-18 TPI threads on the throat adapter).

• Perimeters / Wall Count: 4 to 6 walls minimum (ensures acoustic air-tightness and strengthens thread engagement).

• Infill Density: 25% to 40% (Gyroid or Cubic pattern) to add structural mass and damp resonant frequencies.

• Print Orientation: Print the throat adapter vertically (flange down) for optimal thread reproduction without support artifacts.