d&b audiotechnik M4 Monitor

2-way stage monitor


The d&b audiotechnik M4 Monitor is a 2-way high-performance stage monitor employing an integrated 15” LF and 1.3” exit horn-loaded HF coaxial driver design that utilizes 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.

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

System data

Frequency response (–5 dB standard) 55 Hz – 17 kHz 4
Max. sound pressure (1m, free field)1
with D6/10D
with D20/30D
with D80 134 dB7 / 135 dB 17
138 dB7 / 140 dB 8
138 dB7 / 140 dB 8
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
optional 2 x EP5 or 2 x NL4

Dimensions, weight

Dimensions (H x W x D) 363 x 580 x 505 mm 2
14.3 x 22.8 x 19.9″ 2
Weight 20 kg
44 lb

Additional information

Weight 44 lbs
Dimensions 20 × 23 × 15 in