Audibax Pro Columbia 12 - 12″ 2-way passive speaker, 400 W RMS, 129 dB SPL

Audibax Pro Columbia 12 - 12″ 2-way passive speaker, 400 W RMS, 129 dB SPL

The Audibax Pro Columbia 12 is a 2-way passive speaker designed for sound reinforcement at events, rental and fixed installations . It features a 12″ woofer with a 2.5″ voice coil and a 1.35″ horn-loaded compression driver ( 3.5″ voice coil), delivering a balanced and powerful response. Its 55 Hz–20 kHz frequency response , 94 dB (1 W/1 m) sensitivity and 129 dB maximum SPL deliver superior coverage of medium-sized rooms with good vocal clarity and bass punch. It operates at 8 Ω and supports 400 W RMS ( 800 W peak ), making it easy to pair with professional 8 ohm power amps.

The multi-layer plywood enclosure prioritizes rigidity and durability. The waveguide offers 90° × 80° dispersion for uniform coverage, and features wall-mounting options and compatibility with steering wheels and stands , making it easy to integrate into a variety of configurations. Measuring 360 × 360 × 610 mm and weighing 15 kg , the Columbia 12 installs easily into standard racks and frames.

Main features

• 2-way configuration : 12″ woofer ( 2.5″ coil) + 1.35″ HF driver in horn ( 3.5″ coil).
• Allowable power : 400 W RMS / 800 W peak at 8 Ω .
• Acoustic performance : 94 dB sensitivity (1 W/1 m) and 129 dB SPL max.
• Frequency response : 55 Hz – 20 kHz .
• Directivity : 90° (H) × 80° (V) for controlled coverage.
• Enclosure : high-strength multi-layer plywood .
• Installation : Wall mount and compatibility with steering wheel and brackets .
• Dimensions and weight : 360 × 360 × 610 mm , 15 kg .
• Color : black.

Product benefits

• Maximum performance/size ratio : 12″ with high SPL for authoritative sound without oversizing the system.
• Consistent quality : 90x80 directivity that focuses energy on the audience and improves intelligibility.
• Professional construction : multi-layer wood enclosure that reduces resonances and improves durability.
• Easy integration : Versatile mounting options for fixed installations and mobile applications.

Use cases

• Events and live : Main PA or side reinforcements in medium-sized venues and stages.
• Fixed installation : gyms, pubs, auditoriums, educational centers and places of worship.
• Multi-zone systems : reinforcement by zones where 12″ adhesion and controlled coverage are required.

Frequently Asked Questions

• Does it need external amplification? Yes. It's an 8 Ω passive speaker and requires a power amplifier rated at 400 W RMS .
• What mounting hardware does it support? Wall mounting , steering wheel mounting, and brackets are available depending on the project's needs.
• What is the enclosure made of? Multi-layer plywood with a durable finish for heavy-duty use.

Package contents

• 1 × 12″ Passive Speaker
• 1 × User Manual

Description for projects

2-way passive loudspeaker with 12″ woofer (VC 2.5″) and 1.35″ HF driver in horn ( VC 3.5 ″ ) ; 8 Ω ; 400 W RMS / 800 W peak ; 94 dB (1 W/1 m) ; 129 dB SPL max. ; 55 Hz–20 kHz ; 90° × 80° dispersion ; multi-layer plywood enclosure ; wall / steering wheel / bracket mounting options ; dimensions 360 × 360 × 610 mm ; weight 15 kg ; color black .