ISORAY18S

Flyable line source Subwoofer

Frequency response (−6 dB no preset): 33~100 Hz
Maximum SPL (calculated): 128 dB RMS / 134 dB Peak
Speaker Weight: 45 kg
Nominal directivity (−6 dB): Omni in usable range. Cardioid preset

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Overview

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Elevated bass that refuses to stay grounded—the CELTO ISORAY18S delivers a genuine 1200 W RMS (4800 W peak) with deep, controlled low-end extension in a flyable, arrayable cabinet. This touring-grade line source subwoofer seamlessly integrates with ISORAY 10+ arrays, providing perfect alignment and extended throw for large-scale systems. Ideal for festivals, arenas, concert tours, theatres, and outdoor events demanding high-impact bass with or without separate ground stacks. Powered by a premium 18" neodymium driver with ±11 mm linear Xmax and triple forced cooling system for minimal power compression and maximum reliability. Outdoor-grade Baltic birch plywood cabinet with rubberized PolyUrea finish and cable-free integrated rigging supports safe flying with up to 12 elements. Achieving impressive sensitivity and up to 137 dB peak SPL while maintaining lightweight design at around 45 kg. Front and rear Neutrik Speakon connectors with parallel wiring ensure flexible cardioid or standard configurations. Dedicated presets optimize performance for omni or directional low-frequency control. The ISORAY18S proves that powerful sub-bass can soar as high as the mains—literally redefining what's possible in compact line array systems.

Specifications

Speaker type: Flyable line source Subwoofer
Power Handling (AES standard): 1200 W RMS / 4800 W Peak
Nominal impedance: 8 Ω
Average sensitivity: 97 dB / 1 W / 1 m
Maximum SPL (calculated): 128 dB RMS / 134 dB Peak
Frequency response (−6 dB no preset): 33~100 Hz
Nominal directivity (−6 dB): Omni in usable range. Cardioid preset
Cabinet: Marine grade Baltic Birch Plywood Heavily braced with Tongue & Groove
Cabinet finish: Touring Grade Rubberized PolyUrea Black coating Acoustic PU foam behind Front grill
Flying hardware: Fully integrated, cable-free, rigging bi-directional flying ability
Mounting hardware: 1pc M20 thread socket
LF: 18" CELTO 18EXN1200-8
Woofer Chassis: Die Cast Aluminium
Woofer Voice coil: 4" / 100 mm long throw
Crossover: No, active mode only
Connectivity: Genuine NEUTRIK 2pcs Speakon NL4MP on rear, 1pc on front with switch for 1+/-1 or 2+/2- input
Speaker size (HxWxD): 585 x 420 x 780 mm
Speaker Weight: 45 kg
Shipping information: 52 kg 730 x 540 x 900 mm
Accessories: CCA118S-FR (large flying frame) CCA-IFR (Intermediary flying frame) CCA118S-WB (metal wheelboard) CCA118S-SBAG (padded cover bag) CPC-70 (pole bar with crank) SUBWHKIT100C (castor wheel kit)