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The M4 is a visually discreet, 2-way high performance stage monitor employing an integrated 15" /1.3" exit coaxial driver with a CD horn and passive crossover network. In its standard 50° x 70° dispersion configuration it provides an accurately defined coverage area on stage and when used upright it is transformed into a powerful PA system. The M4 can optionally be operated in 2-way active mode by changing the d&b D12 amplifier's configuration without any modifications to the loudspeaker. For its compact dimension and mere 20 kg (44 lb) it produces an incredible 138 or 140 dB SPL when driven in passive or active mode respective