2-Way Stage Monitor

The M4 is a 2-way high performance stage monitor employing an integrated 15” LF and 1.3” exit horn loaded HF coaxial driver design that utilises neodymium magnets. The constant directivity dispersion of 50° x 70° (h x v), which this unique horn provides, delivers an accurately defined coverage area on stage. The M4 can also be operated in 2-Way Active mode. When the cabinet is used in an upright position the M4 serves as a powerful PA loudspeaker with a 70° x 50° dispersion suitable for a variety of applications. For dedicated installation applications the dispersion characteristics of the M4 driver assembly can be rotated in 45° increments. The M4 cabinet is constructed from marine plywood, which incorporates the handles, has an impact resistant paint finish, M10 threaded inserts and a socket to accept loudspeaker stands. The front of the loudspeaker cabinet is protected by a rigid metal grill backed with an acoustically transparent foam. Two runners recessed in the bottom panel protect the cabinet from scratching and prevents movement.

Amplifiers

The d&b D20 and 30D amplifiers are recommended to drive the M4. The d&b D80, 10D and D6 can also be used. The M4 monitor can be driven in passive mode, requiring one amplifier channel. Alternatively, for increased headroom, the M4 can be driven in 2-Way active mode, using two channels of the D20, D80, 10D or 30D amplifiers.

Features

• Components 15″/1.3″
• Dispersion 50° x 70° rotatable
• SPLmax 140 dB
• Weight 20 kg / 44 lb

Specifications

• Frequency response (-5 dB standard): 55 Hz – 17 kHz [1]
• Max. sound pressure [2]:
  with 10D: 134 dB [3] / 135 dB [4]
  with D20/30D: 138 dB [3] / 140 dB [5]
  with D40/D80/40D: 138 dB [3] / 140 dB [5]
• Cabinets per amplifier channel (passive mode): 2
• Cabinets per D20/D80 (active mode): 4

Loudspeaker data

• Configuration: 2-way stage monitor
• Nominal impedance: 8 Ω
• Power handling capacity (RMS/peak 10 ms): 400/1600 W
• Nominal dispersion angle (h x v): 50° x 70° rotatable
• Components:
  15″ driver with neodymium magnet
  coaxial 1.3″ exit compression driver with 3″ coil and CD horn
  passive crossover network
• Connections: 2 x NLT4 F/M

Dimensions / weight

• Dimensions (H x W x D): 363 x 580 x 505 mm [6] / 14.3 x 22.8 x 19.9″ [6]
• Weight: 20 kg / 44 lb

[1] with floor coupling
[2] 1 m, free field, SPL max peak test signal: pink noise with crest factor 4, one speaker driven
[3] passive mode
[4] active mode (10D only)
[5] active mode
[6] overall dimensions (projected footprint)