Audibax Pro Columbia 18S 18" Passive Subwoofer (800 W RMS, 129 dB, 8 Ω)

Audibax Pro Columbia 18S 18" Passive Subwoofer (800 W RMS, 129 dB, 8 Ω)

The Audibax Pro Columbia 18S is a high-performance passive subwoofer with an 18" woofer and a 3" voice coil , designed to provide a solid and controlled bass foundation in professional PA systems. With 800 W RMS of admissible load (up to 1600 W peak ), sensitivity of 97 dB and maximum SPL of 129 dB , it delivers a punchy, deep sound with a usable response from 35 Hz to 120 Hz . The enclosure, made of plywood with a black finish and IP50 protection rating, is designed to withstand daily rental and installation work.

Its Speakon NL4 connectivity facilitates integration with standard power amplifiers and parallel wiring of the system. For satellite configurations, it includes a 36 mm top plinth that allows pole mounting and elevating midrange/tweeter cabinets directly above the subwoofer. Measuring 65 × 59 × 50 cm (L × W × H) and weighing 32 kg, the Columbia 18S is a robust and versatile option for events, venues, and fixed installations requiring consistent, impactful bass.

Main features

• Format : high-performance passive subwoofer.
• Transducer : 18" woofer with 3" voice coil .
• Admissible power : 800 W RMS / 1600 W peak .
• Performance : 97 dB (1 W/1 m); max. SPL 129 dB .
• Frequency response : 35 Hz – 120 Hz .
• Impedance : 8 Ω .
• Connectivity : Speakon NL4 (stage input) and link connectors for parallel.
• Mounting : 36mm socket/socket for pole (“Stand” mounting).
• Construction : plywood enclosure, black finish, IP50 .
• Dimensions and weight : 65 × 59 × 50 cm (L × W × H); 32 kg .

Product benefits

• Deep, defined bass : The 18" driver and 800W RMS handling deliver punch and coverage in medium and large spaces.
• Easy integration : 8 Ω impedance and Speakon connectivity for quick wiring with common amplifiers and power supplies.
• Versatility in 2.1 / 2.2 systems : 36 mm socket for mounting tops on poles and optimizing the system footprint.
• Reliability for professional use : plywood enclosure and IP50 to withstand transport and continuous operation.

Use cases

• Live Events : Low frequency reinforcement for bands, DJs and shows.
• Fixed facilities : multipurpose rooms, clubs, sports and hospitality spaces.
• Rental companies : modular PA system setup with powerful subwoofer.

Description for projects

Audibax Pro Columbia 18S passive subwoofer with 18" (VC 3") woofer , 800 W RMS / 1600 W peak , 97 dB (1 W/1 m), max. SPL 129 dB , 35–120 Hz , 8 Ω ; Speakon NL4 connectivity (input) with links; 36 mm pole socket ; plywood enclosure, IP50 ; dimensions 65 × 59 × 50 cm (L × W × H); weight 32 kg . Manual included.