Celto Acoustique SU218TL Transmission Line Dual 18″ Subwoofer - SPECEL091

Description

The Celto Acoustique SU218TL is a rear-loaded transmission line subwoofer designed for extreme low-end performance in high SPL applications.

Featuring dual 18″ ultra long-throw drivers and a massive 3000W RMS power rating, it delivers powerful bass reinforcement for large-scale events, live performances, and fixed installations.

Ideal for both touring and permanent setups, it performs exceptionally in venues like clubs, theaters, auditoriums, and multi-functional spaces.

Features

Rear-Loaded Transmission Line Design: The SU218TL uses a transmission line cabinet structure that enhances low-frequency extension and efficiency. It delivers a deep bass response down to 26Hz, while maintaining an impressive 104dB sensitivity at 1W/1m.

3000W RMS Power Handling: With a real-world RMS rating of 3000W (12,000W peak), this subwoofer can handle intense audio loads with ease—perfect for high-output touring systems or demanding installations.

Dual 18″ Ultra Long-Throw Drivers: Equipped with two premium CELTO Acoustique 18″ ferrite magnet drivers, each featuring a massive ±15mm linear Xmax and 4″ voice coil, the SU218TL ensures accurate, distortion-free bass reproduction at high volumes.

Triple Forced Cooling System: An advanced cooling mechanism minimizes power compression and enhances long-term performance and reliability, even during extended high-output sessions.

Heavy Braced Baltic Birch Cabinet: Constructed from CNC-machined 18mm exterior-grade Baltic birch with tongue-and-groove assembly, the cabinet is heavily braced to eliminate unwanted vibrations and maximize acoustic integrity.

Touring-Grade Finish and Build: The durable rubberized PolyUrea black textured coating provides a rugged, road-ready finish. It’s built for stacking (no flying hardware) and includes dual M20 threaded pole mounts for flexible deployment.

The SU218TL is optimized for use in cardioid configurations, allowing for better control over low-frequency dispersion and stage bleed.

Specifications

• Speaker Type: Rear-loaded transmission line passive subwoofer

• Power Handling: 3000W RMS / 12,000W Peak (50~500Hz AES)

• Impedance: 4Ω

• Frequency Response (-6dB): 26Hz – 900Hz (half-space, no EQ)

• Sensitivity (40–100Hz): 104dB/W/m

• Max SPL (1m): 139dB RMS / 145dB Peak

• Nominal Directivity: Omni-directional in usable band

• LF Drivers: 2 × 18″ CELTO Acoustique ferrite magnet, 4″ in/out voice coil, ±15mm linear Xmax

• Crossover: Active only (no internal crossover) – recommended with CLM48 DSP

• Flying Hardware: None – ground stacking only

• Pole Mounts: 2 × M20 threaded

• Connectors: 3 × Neutrik Speakon® NL4MP (1 front input, 2 rear)

• Cabinet: 18mm CNC Baltic birch plywood, tongue and groove construction

• Finish: Touring-grade rubberized black PolyUrea coating

• Dimensions (H × W × D): 580 × 1246 × 728 mm

• Weight: 111 kg (net), 123 kg (shipping)

• Shipping Dimensions: 700 × 1400 × 850 mm

Dimensions

700 × 1400 × 850 mm

Weight

123 kg 

Disclaimer

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