Product Information:M88


Overview
Specifications
Dimensions
Parts & Accessories


Touring
Subwoofer, Dual 18"
35Hz - 150Hz
The Idea Behind it
The M88 is a high efficiency, high power handling loudspeaker designed for touring sound sub-bass applications. The M88 features two, 4” voice coil, long excursion 18” cone drivers mounted in a mechanically and acoustically optimized bass reflex enclosure. The cone driver incorporates McCauley Sound’s latest FEA optimized neodymium motor with a new hybrid paper composite cone body for increased linearity and lower distortion at high output levels. The M88 enclosure features a large vent area for decreased port turbulence and integrated handles and casters which allow for easy setup, loading and transportation.
Construction
The enclosure is constructed of multi-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.
Applications
Main P.A. The primary sound source for any concert or event.
Compatible Products
M421 Subwoofer, Quad 21"
SA288 Subwoofer, Dual 18"
Features
  • Interlocking and Stacking Skids
  • Integrated Castor System
  • Quick Release Grill
  • Dual Neutrik NL4 Connectors
  • Ergonomically-placed handles
  • Perforated Steel Grill
  • 12-Ply Dadoed Construction
  • Durable ProCoat Elastomeric Finish

Specifications
  Performance Overview    
 Class  Subwoofer
 Freq. Response (-3dB)  35Hz - 150Hz
 Low Freq. Response (-10dB)  28Hz
  Power Handling (Program)    
 Low  3200W
 Low (1)  1600W
 Low (2)  1600W
  Power Handling (AES)    
 Low  1600W
 Low (1)  800W
 Low (2)  800W
  Max Peak SPL    
 Low  139dB
  Max Continuous SPL    
 Low  133dB
  Impedance    
 Low  4Ω
 Low (1)  8Ω
 Low (2)  8Ω
  Sensitivity    
 Low  101dB
 Low (1)  98dB
 Low (2)  98dB
  Critical Filter / Crossover Data    
 Bandpass  30Hz - 85Hz
  Construction    
 Method  CNC Machined, Dadoed, Hand Finished, Rabbet
 Material  12-Ply Birch
 Finish  Procoat
  Dimensions    
 Product Dimensions  45.5in. x 22.75in. x 30.33in.
1155.7mm x 577.85mm x 770.38mm
 Net Weight  185lbs.
83.9kg.
  Design Properties    
 Characteristics  Vented, Direct Radiating
 Powering Options  Drivers Wired Individually
 Transportation Options  Casters
  Hardware    
 Connectors  NL4
 Grill Type  Acoustically Transparent Foam, Fitted Perforated Steel
 Handle Type  Handle Designed into Enclosure
 Handle Locations  Left, Right
 Suspension  Locking Skids

Architectural Specifications

The subwoofer loudspeaker system shall consist of two (2) 18 in. (460 mm) transducers mounted in an optimally vented bass reflex enclosure, tuned for maximum low frequency response. Each transducer shall have a 4 in. (102 mm) diameter voice coil, high flux density Neodymium motor, Aluminum heat sink, and an excursion of least ±0.6 in (15 mm). The horizontal and vertical coverage for a single loudspeaker system shall be omnidirectional in the operating band. Multiple loudspeaker systems in an array shall be capable of producing a directional coverage pattern.


The typical performance specifications shall be as follows: The unprocessed system frequency response shall vary no more than ±3 dB from 35 Hz to 150 Hz measured on axis. The measured sensitivity, (when 2.0 V is applied to each transducer powered in parallel as a 4 ohm load,) shall be at least 101 dBSPL at 1 m ground-plane, from 40 Hz to 80 Hz. Each transducer shall have a rated power capacity of 800W per AES Standard AES2-2012 (1600 W continuous program power) and a nominal impedance of 8 ohms inside the operating band.


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 enclosure shall be constructed of multi-ply void-free birch hardwood plywood and coated with a weather and wear resistant ProCoat™ polyurethane hybrid finish. Components in the front of the enclosure shall be protected by a flat grill made from perforated steel and coated with heat cured epoxy powder. All rigging and other hardware pieces shall be weather protected with a heat cured epoxy powder coat finish.


Input connectors shall be two locking Neutrik NL4 wired in parallel with 12 AWG wire. The connectors shall have a contact resistance of less than 3 m?, insulation rating of at least 250 Vrms, and rated continuous current rating of 30 A per contact. The lifetime of the connectors shall be at least 5000 mating cycles. The connectors shall meet or exceed UL 94 HB flammability standards.


Optional 3/8"-16 UNC threaded mounting/suspension points can be provided upon specification.


The high performance subwoofer loudspeaker system shall be the McCauley Sound model M88.
Illustrations

Applicable Replacement Parts
Part Name Description
RP7089 M88 Replacement Basket  
RP77073R-8 18 inch updated replacement basket neo