5426 Multicell Horn 2x5 3d model

3D printable multicell horn (2x5 cell matrix) designed for 1.75-inch voice coil compression drivers with a standard 1-3/8"-18 TPI threaded throat adapter or editable.

This model is engineered to offer optimal acoustic dispersion and smooth expansion profile control, bridging traditional multicell horn geometry with additive manufacturing techniques. Perfect for DIY audio enthusiasts, custom PA systems, or vintage-style acoustic projects.

Technical Specifications

• Type: Sectoral multicellular horn (5 columns × 2 rows, 10 independent cells)

• Throat entry: 1.75 inch

• Acoustic cutoff frequency: ~850 Hz

• Recommended crossover frequency: 1,800 Hz (min. 1,600 Hz @ 18 dB/oct or 24 dB/oct)

• Nominal overall coverage (-6 dB): 90° × 40° to 100° × 45° (H × V)

• Horizontal pattern: Constant ~90°–100° from 2 kHz to 8 kHz (gradual narrowing down to 70°–80° above 10 kHz)

• Vertical pattern: ~40°–45° (tight control to reduce floor/ceiling reflections)

• Dispersion geometry:

  • Inter-axis cell splay: ~18° to 20°

  • Individual cell flare angle: ~20°

• Recommended loading: 1" compression drivers with 1.4" to 1.75" diaphragms

3D Printing & Assembly Instructions

• Material: PLA, PETG, or ABS (PETG recommended for higher mechanical resistance and outdoor durability).

• Layer Height: 0.20 mm (or 0.28 mm for faster prints with larger nozzles).

• Infill: Minimum 20–30% (Gyroid or Grid) to ensure rigidity and dampen unwanted acoustic resonance.

• Perimeters / Walls: 3 to 4 walls recommended for structural strength.

• Sealing Note: Ensure an airtight seal around the thread/throat connection using Teflon tape or a rubber gasket to prevent acoustic leaks.