12 Inch Line Array Box Design Pdf May 2026

Report: Technical Analysis and Design Guidelines for 12-Inch Line Array Enclosures

Date: October 26, 2023 Subject: Design Parameters, Acoustic Principles, and Resource Availability for 12" Line Array Systems 12 inch line array box design pdf

3. Driver Specifications

LF driver:

• 12" cone, neodymium magnet
• Voice coil: 3" (76 mm), copper-clad aluminum
• Sensitivity: 98 dB (1W/1m)
• Xmax: 6 mm (linear), 12 mm mechanical
• Recommended sealed rear chamber volume: 8–10 L

HF driver:

• 2 × 1.4" exit (or 1 × 2" throat) with polymer diaphragm
• Neodymium motor
• Sensitivity: 110 dB (1W/1m)
• Minimum crossover: 1.2 kHz (12 dB/oct or higher)

Waveguide:

• Horizontal: 90° constant directivity
• Vertical: 10° (aligned to box angle)
• Material: ABS or CNC-machined aluminum

4. Rigging & Inter-Box Angles

• Standard angles: 0°, 2°, 4°, 6°, 8°, 10° (some boxes do 12°).
• 3-point rigging – front, middle, rear (adjusts splay without tools).
• Air gap trap: If the 12" frames touch but waveguides don’t, you get a 5 dB dip at 800 Hz.
• Pro tip: Use a laser pointer jig to set angles faster than inclinometers.

4. Electro-Acoustical Design Specifications

A typical design PDF for a 12" line array element would specify the following components: Report: Technical Analysis and Design Guidelines for 12-Inch

4. Passive Crossover Schematic

• Type: 2nd order low-pass (LF), 3rd order high-pass (HF) with HF lamp protection
• Components (per box):
  • LF coil: 1.2 mH (1.0 mm wire, ferrite core)
  • LF cap: 68 µF (MKP)
  • HF coil: 0.15 mH
  • HF caps: 8.2 µF + 4.7 µF parallel
  • Resistor: 15 Ω / 20 W (HF equalization)
  • PTC / light bulb: 12V / 50W (HF protection)

6. Acoustic Simulation Data (per box, free-field)

| Frequency | SPL @ 2.83V/1m | Directivity (H×V) | |-----------|----------------|-------------------| | 80 Hz | 99 dB | 360° (omni) | | 250 Hz | 101 dB | 180° × 80° | | 500 Hz | 102 dB | 110° × 60° | | 1 kHz | 103 dB | 100° × 30° | | 2 kHz | 104 dB | 90° × 15° | | 5 kHz | 103 dB | 85° × 12° | | 10 kHz | 101 dB | 80° × 10° | 12" cone, neodymium magnet Voice coil: 3" (76

1. Mechanical Design

• External Dimensions (HxWxD): 12.2″ x 23.6″ x 16.5″ (310 x 600 x 420 mm)
• Trapezoid Angle: 10° per side (20° total included)
• Enclosure Material: 15 mm Baltic birch plywood
• Finish: Black textured polyurea coating
• Grille: 1.5 mm perforated steel with acoustically transparent foam backing
• Rigging: Integrated 3-point flyware (front/mid/rear adjustable angles: 0° to 12°, 1° increments)
• Handles: 2 x recessed side pockets, 1 x rear pull handle
• Weight: ~28 kg (62 lbs)