137dB Max SPL
Low profile, space optimized design
Laminar vents
Integrated locking feet
Designed with Cardioid Sub Arrays (CSA) in mind
Optional standard rigging kits for complex flown arrays


The M118i is a high efficiency, high impact sub-bass loudspeaker with exceptionally high power handling. It provides high impact, high sensitivity, low thermal compression and incredibly low distortion, even at the highest drive levels. These combined properties deliver the sonic qualities of precision and musicality.

The M118 features one long excursion, high power handling 18” cone loudspeaker mounted in a mechanically and acoustically optimized bass reflex cabinet with laminar venting. Port turbulence is virtually eliminated, and high drive level distortion is minimized via large, flared, symmetrical laminar venting. It operates from 35 Hz to 100 Hz when flown and from 32 Hz to 90 Hz when used as a general ground support subwoofer.

The M118 enclosure was designed with installation in mind. It features the option of up to 24 integrated fly points and optional array frames that allow for mounting to ceilings and the creation of traditional and cardioid flown arrays. The compact profile allows the M118i to fit easily under stages, up tight to ceilings, and between standard framing for flush mount installations.

The enclosure is constructed of premium birch hardwood plywood and is coated with a weather and wear resistant urethane hybrid finish. Components in the front of the enclosure are protected by a steel grill made from perforated steel that is coated with heat cured epoxy powder and lined with acoustically transparent foam. All optional rigging components are weather and corrosion protected with a heat cured epoxy powder coated finish.

The optimum processed loudspeaker solution for the RMS-ACOUSTICS SB subwoofer family are the RMS-ACOUSTICS series of processed amplifiers, also the Linea Research C and M series amplifiers, with proprietary presets provided by RMS-ACOUSTICS.



M118CART1 Welded Aluminum Cart, Holds up to 3 M118
M118RS2 Flown installation rigging kit, 2 Box
M118RS3 Flown installation rigging kit, 3 Box
M118RS4 Flown installation rigging kit, 4 Box
M118RS5 Flown installation rigging kit, 5 Box
EYEBOLT4 Kit of (4) 3/8-16 Eye Bolt Kit for M118i