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technical specifications


Product Group: Touring Class System Type: Subwoofer, Dual 18"

FEATURES AND ADVANCES • High Output, High Performance • Heavy Duty Tour-Grade Construction • Integrated Casters and handles • Integrated Locking Skids On Two Faces • Weather and Wear Resistant

PRODUCT DESCRIPTION The M88 is a high power, high output subwoofer loudspeaker designed for touring sound reinforcement. The bass reflex design features two 4” voice coil, long excursion 18” transducers mounted in a mechanically and acoustically optimized, rugged weather resistant enclosure. Integrated handles and casters allow for easy setup, loading and transportation.

performance parameters System Type

Subwoofer, Dual 18"

Frequency Response -10dB +/- 3dB

Maximum SPL LF 1 LF 2 LF

28Hz - 1kHz 35Hz - 150Hz

physical properties Weight inches centimeters

Enclosure Material 98dB @ 2.83V 1 m 98dB @ 2.83V 1 m 103dB @ 2.83V 1 m both drivers (cont. / peak)

131B / 136dB calculated ground plane 131B / 136dB calculated ground plane 137B / 142dB calculated 2m ground plane

Power Ratings LF 1 - AES LF 2 - AES

CONSTRUCTION The enclosure is constructed of 12-ply void-free birch hardwood plywood and is coated with a weather and wear resistant ProCoat™ polyurea hybrid finish. All rigging components are weather protected with a heat cured epoxy powder coat finish. Components in the front of the enclosure are protected by a flat grill made from perforated steel that is coated with heat cured epoxy powder, and lined with acoustically transparent foam. Cam-Lock quick release fasteners allow easy access to the loudspeakers with only a screw driver.

185Lbs / 84.1kg


Sensitivity LF 1 LF 2 LF

APPLICATIONS • Stadiums and Arenas • NightClubs and Concert Halls • Theme Parks • Theatrical Sound Reinforcement • House of Worship

Hardware Finish

5/8” 12 ply birch laminate Integrated Locking Skids on Two Faces Optional 3/8-16 reinforced hang points Procoat™ Polyurea-Hybrid Weatherproofing

(Black is standard, White and / or Custom Colors Available)

Transducers LF

Connectors 600W @ 8Ω 600W @ 8Ω

22.75 h x 45.50 w x 35.41 d 57.78 h x 115.57 w x 79.78 d

LF 1 LF 2

Optional Accessories

(2) 18" Cone Transducers, 4" Voice Coil Neutrik™ Speakon NL8 Pins 1+ / 1Pins 2+ / 2-


(Touring Cover For M88)

Dimensional Illustrations

577.85 22.75

6.35 .25

1155.70 45.50

899.43 35.41

Available 3.5" Swivel Castors

770.38 30.33

Architects and engineers specifications The subwoofer loudspeaker system shall incorporate two 4" (102 mm) voice coil, long excursion 18" (457 mm) diameter transducers, mounted in an optimally vented bass reflex enclosure, tuned for maximum low frequency response. The horizontal and vertical beam width for a single unit shall the 360°. Directional characteristics can be achieved with an array of multiple cabinets. The unprocessed system frequency response shall vary no more than ¹3 dB from 35 Hz to 150 Hz measured on axis. Each transducer shall produce a Sound Pressure Level (SPL) of 98 dB SPL at a distance of 1 meter with an electrical power input of 1 Watt, and shall be capable of producing a maximum peak output of 142 dB SPL on axis at 1 meter. Each low frequency transducer shall handle 1250 Watts of amplifier power (per AES Standard AES2-1984-r2003) and shall have a nominal impedance of 8 Ohms. The loudspeaker enclosure shall have a maximum weight of 185 lbs.(84.1 kg) and shall measure 45.5" (1156 mm) wide, 22.75" (578 mm) in height, and 35.41" (900 mm) in depth. The structure of the enclosure shall be constructed of 12-ply void-free birch hardwood plywood and shall have a weather and wear resistant ProCoat(tm) polyurea hybrid finish. Input connectors shall be two, Neutrik Speakon NL4 locking connectors, each connector wired in parallel. Optional 3/8"-18 UNC threaded mounting/suspension points can be provided upon specification. Components in the front of the enclosure are to be protected by a curved grill made from perforated steel that is coated with heat cured epoxy powder, and lined with acoustically transparent foam. The grill shall be connected to the cabinet with Cam-Lock quick release fasteners. The high performance subwoofer loudspeaker system shall be the McCauley Sound model M88.