Audibax Pro Columbia 15 - 15″ 2-way passive speaker, 500 W RMS, 131 dB SPL

Audibax Pro Columbia 15 - 15″ 2-way passive speaker, 500 W RMS, 131 dB SPL

The Audibax Columbia 15 is a 2 -way passive loudspeaker with a 15″ woofer ( 3 ″ voice coil) and a horn -mounted tweeter driver with a 1.75″ diaphragm ( 4.5″ voice coil), designed to deliver high sound pressure with great definition in live sound and fixed installation applications. Its frequency response of 50 Hz–20 kHz , sensitivity of 95 dB (1 W/1 m) and maximum SPL of 131 dB provide powerful coverage with vocal clarity and bass punch. It works at 8 Ω and supports 500 W RMS (up to 1000 W peak ), ideal for combining with professional power amplifiers.

The enclosure, finished in multi-layer plywood , integrates a 90° × 80° dispersion waveguide for controlled coverage. It incorporates wall-mounting options and lifting points (handwheel and brackets), and includes a bracket to speed up installation. Weighing 20 kg and measuring 420 × 420 × 690 mm , the Columbia 15 combines robustness and ease of integration into common racks and mounting structures.

Main features

• 2-way configuration with 15″ woofer (3″ coil) + 1.75″ HF driver in horn (4.5″ coil).
• Load power : 500 W RMS / 1000 W peak at 8 Ω .
• Sound pressure : 95 dB sensitivity (1 W/1 m) and 131 dB SPL max.
• Frequency response : 50 Hz – 20 kHz for solid bass and defined highs.
• Dispersion : 90° H × 80° V for uniform coverage.
• Enclosure : high-strength multi-layer plywood .
• Installation : wall mount, steering wheel and brackets ; bracket included .
• Dimensions and weight : 420 × 420 × 690 mm , 20 kg .

Product benefits

• High performance with control : 131 dB SPL and 90×80 directivity to project clearly without excessive reflection.
• Installation versatility : wall, lifting and bracket options, with hardware included for quick start-up.
• Professional construction : Multi-layer plywood enclosure reduces resonances and improves durability under intensive use.
• Acoustic efficiency : 95 dB sensitivity that allows high levels to be achieved with reasonable power stages.

Use cases

• Events and live : main PA or side reinforcements on medium-sized stages.
• Fixed installation : multipurpose rooms, gyms, auditoriums, pubs and places of worship.
• Zone reinforcement : multi-zone systems where 15″ 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 suitable for 500 W RMS (1000 W peak).
• Does it include hardware? Yes, it includes a bracket and supports wall mounting, steering wheel mounting, and brackets depending on the project.
• What is the enclosure's finish like? Multi-layer plywood for greater rigidity and durability.

Description for projects

2-way passive loudspeaker with 15″ woofer (VC 3″) and 1.75″ HF driver in horn ( VC 4.5 ″ ) ; 8 Ω ; 500 W RMS / 1000 W peak ; 95 dB (1 W/1 m) ; 131 dB SPL max. ; 50 Hz–20 kHz ; dispersion 90° × 80° ; multi-layer plywood enclosure ; wall / steering wheel / bracket installation with bracket included ; dimensions 420 × 420 × 690 mm ; weight 20 kg .