CDD12
A two-way passive installation loudspeaker using coaxial 12-inch LF and 1-inch HF drivers with horizontal coverage varying from 110° to 60° for near and far audience areas.
- Drivers
- 12in LF + 1in HF coaxial
- Nominal coverage
- 110°–60° H × 60° V
- Frequency response
- 62Hz–20kHz (±3dB)
Product Overview
The CDD12 is a two-way passive installation loudspeaker in Martin Audio's CDD series, coaxially arranging a 12-inch LF driver and 1-inch-exit HF compression driver. Its coaxial assembly blends the HF waveguide into the profile of the LF cone, combining near point-source geometry with wide coverage.
Horizontal coverage varies from 110° on the near side to 60° on the far side, with 60° vertical coverage. The coaxial driver assembly can be rotated so the coverage orientation can be selected for portrait or landscape installation. A passive crossover operates at 1.9kHz, and Martin Audio controllers provide compatible FIR presets.
Specifications
- System
- Two-way coaxial Differential Dispersion passive installation loudspeaker
- Drivers
- LF: 12in long-excursion cone with 2.5in voice coil; HF: 1in-exit compression driver with 1.7in polyimide diaphragm
- Frequency response
- 62Hz–20kHz (±3dB), 50Hz (-10dB)
- Sensitivity
- 97dB (1W/1m)
- Maximum SPL
- 122dB continuous / 128dB peak
- Nominal coverage
- 110°–60° horizontal × 60° vertical, rotatable
- Power handling
- 300W AES / 1,200W peak
- Nominal impedance
- 8 ohms
- Crossover
- 1.9kHz, passive
- Connectors
- 20A push-lock terminals
- Dimensions
- 360mm W × 560mm H × 350mm D
- Weight
- 19kg
- Enclosure
- 38-litre birch-plywood enclosure, black or white finish
- Mounting points
- 6 × M8 bracket inserts and 10 × M8 flying points
Design & Technology
An HF waveguide continuous with the LF cone
A 1-inch-exit HF compression driver sits at the centre of the 12-inch LF driver, with a static waveguide blending into the LF cone profile. Martin Audio uses this arrangement to keep both bands close to a common acoustic position while reducing the HF narrowing associated with conventional coaxial geometry.
Wider near-side and narrower far-side coverage
Horizontal coverage is not a fixed symmetrical angle; it varies from 110° on the near side to 60° on the far side. The design distributes sound widely toward nearby listeners and more narrowly toward distant listeners, covering an audience area with depth from a single enclosure.
Selecting coverage orientation in portrait or landscape
The coaxial assembly can be rotated in 90° steps, allowing the near and far sides of the Differential Dispersion pattern to be aimed at the audience in portrait or landscape installation. M8 bracket inserts and flying points support wall, ceiling and truss mounting.
Internal crossover and controller presets
An internal passive crossover divides the LF and HF sections at 1.9kHz, allowing operation from one external amplifier channel. Martin Audio provides FIR presets for compatible DX controllers and iKON amplifiers, supporting system EQ and limiting.
Sources
- 01Martin AudioCDD12
Manufacturer product page · Accessed August 16, 2026
- 02Martin AudioCDD12 Datasheet
Official datasheet · Accessed August 16, 2026
- 03Martin AudioCDD User Guide
Official manual · Accessed August 16, 2026
- 04Martin AudioCDD Series Brochure
Official datasheet · Accessed August 16, 2026