SU218TL

Pants-Moving Transmission Line.

Touring Subwoofers SUBIUM

Where to buy

Description

When pants-moving authority is non-negotiable—the CELTO Acoustique SU218TL unleashes a commanding 3000W RMS (12000W peak) with profound extension down to 26 Hz and remarkable 104 dB/1W/1m efficiency. This rear-loaded Transmission Line dual 18" subwoofer redefines low-end performance for flagship touring systems and large-scale installations. Engineered for festivals, arenas, concert halls, and high-output clubs where visceral, musical bass must dominate with precision. Twin premium 18" CELTO drivers with ±15 mm linear Xmax and triple forced cooling system deliver relentless power handling and minimal compression. Heavily braced Baltic birch plywood cabinet with tongue-and-groove construction and rubberized PolyUrea finish ensures rock-solid, vibration-free operation. 139 dB RMS / 145 dB peak SPL capability, plus cardioid array preset, offers flexible deployment for controlled coverage. Dual M20 sockets, front and rear Neutrik Speakon connectors facilitate advanced rigging and signal distribution. Optional accessories including padded bag, pole bar, and castor kit support seamless touring logistics. The SU218TL demonstrates that true low-end mastery can make everything move—while keeping the performance firmly under control.

Key Features

Rear Loaded Transmission Line subwoofer
Down to 26Hz and still 104dB/1W/1m Efficiency
Real 3000W RMS power capacity
Premium 18” LF drivers with massive ±15mm linear Xmax
Triple forced cooling system for low power compression
Heavy braced cabinet for vibration free dynamic response
Touring grade Rubberized black PolyUrea finish
Cardio Subwoofer Array Ready

Applications

Touring Engineered to endure

Technical specifications

Speaker type	Transmission line Subwoofer
Power Handling (AES standard)	3000 W RMS / 12000 W Peak
Nominal impedance	4 ohms
Average sensitivity	104 dB / 1 W / 1 m
Maximum SPL (calculated)	139 dB RMS / 145 dB Peak
Frequency response (-6 dB no preset)	26~900 Hz
Nominal directivity (-6 dB)	Omni in usable range. Cardioid preset
Cabinet	Exterior grade Baltic Birch Plywood Heavily braced with Tongue & Groove
Cabinet finish	Touring Grade Rubberized PolyUrea Black coating Acoustic PU foam behind Front grill
Floor monitor use	N/A
Flying hardware	No
Mounting hardware	2pcs M20 thread socket
LF	18" CELTO ACOUSTIQUE 18Ex 1 505-8 (2pcs)
Woofer Chassis	Die Cast Aluminium
Woofer Voice coil diameter	4" / 100 mm long throw
Crossover	No, active mode only
Connectivity	Genuine NEUTRIK 2pcs Speakon NL4 mP on rear 1pc Speakon NL4 mP on front
Speaker size (HxWxD)	580 x 1246 x 728 mm
Speaker Weight	111 kg
Shipping information	123kg 700 x 1400 x 850 mm
Accessories	SU218TL-SBAG (padded cover bag) CPC-70 (pole bar with crank) SUBWHKIT100C (castor wheel kit)

Product files

Name	Category	Type	Size
CELTO_CPC-70_A0_20250721_WEB_CAD CELTO_CPC-70_A0_20250721_WEB_CAD	CELTO_CPC-70_A0_20250721_WEB_CAD	PDF	33.1 KiB	Download
CELTO_SUBWHKIT100C_A0_20250721_WEB_CAD CELTO_SUBWHKIT100C_A0_20250721_WEB_CAD	CELTO_SUBWHKIT100C_A0_20250721_WEB_CAD	PDF	37.1 KiB	Download
CELTO_SU218TL_A0_20250712_WEB_CAD CELTO_SU218TL_A0_20250712_WEB_CAD	CELTO_SU218TL_A0_20250712_WEB_CAD	PDF	115.3 KiB	Download
CELTO_SU218TL_A0_20250712_WEB_CAD CELTO_SU218TL_A0_20250712_WEB_CAD	CELTO_SU218TL_A0_20250712_WEB_CAD	DWG	999.0 KiB	Download
CELTO_SUBWHKIT100C_A0_20250721_WEB_CAD CELTO_SUBWHKIT100C_A0_20250721_WEB_CAD	CELTO_SUBWHKIT100C_A0_20250721_WEB_CAD	DWG	740.1 KiB	Download
CELTO_CPC-70_A0_20250721_WEB_CAD CELTO_CPC-70_A0_20250721_WEB_CAD	CELTO_CPC-70_A0_20250721_WEB_CAD	DWG	781.7 KiB	Download