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M4

M4 loudspeaker

The M4 is a high performance stage monitor employing an integrated
15”/1.3” exit coaxial driver design with neodymium magnet and
constant directivity horn loading. Its dispersion of 50° x 70° (hor. x
vert.) provides an accurately defined coverage area on stage. Used
upright the M4 serves as a powerful front PA speaker (70° x 50°) for
various applications.

The M4 is a two-way design with a built-in passive crossover network.
It can optionally be operated in two-way active mode just by changing
the configuration of the D12 amplifier without any modifications to the
loudspeaker. Its frequency response extends from 55 Hz to above
17 kHz.

The M4 cabinet is constructed from marine plywood and has an impact
resistant paint finish. The front of the loudspeaker cabinet is protected
by a rigid metal grill in front of a replaceable acoustically transparent
foam. The side panels incorporate a pair of handles, a pole mount
socket and four M10 threaded inserts to connect to different rigging
devices and brackets. Two runners recessed in its bottom panel protect
the cabinet from scratching and prevent unwanted movement.

Connections

Connector wiring

The M4 cabinet is fitted with a pair of EP5 connectors. All pins of both
connectors are wired in parallel. Using the male connector as the input,
the female connector allows for direct connection to additional
loudspeakers.

The M4 can be supplied with NL4 output connectors as an option. Pin
equivalents of EP5 and NL4 connectors are listed in the table below.

LF +

LF –

HF +

HF –

n.a.

EP5

1

2

3

4

5

NL4

1+

1–

2+

2–

n.a.

M4 Manual

(1.8 en)    

Page 4 of 10

Summary of Contents for M4

Page 1: ...M4 Manual 1 8 en ...

Page 2: ...nformation M4 Manual Version 1 8 en 03 2016 D2990 EN 01 Copyright 2016 by d b audiotechnik GmbH all rights reserved Keep this manual with the product or in a safe place so that it is available for future reference When reselling this product hand over this manual to the new customer If you supply d b products please draw the attention of your customers to this manual Enclose the relevant manuals w...

Page 3: ...he accessories as detailed in our specific Mounting instructions or in our Flying system and rigging manuals Ensure that all additional hardware fixings and fasteners used for installation or mobile deployment are of an appropriate size and load safety factor Pay attention to the manufacturers instructions and to the relevant safety guidelines Regularly check the loudspeaker housings and accessori...

Page 4: ...ood and has an impact resistant paint finish The front of the loudspeaker cabinet is protected by a rigid metal grill in front of a replaceable acoustically transparent foam The side panels incorporate a pair of handles a pole mount socket and four M10 threaded inserts to connect to different rigging devices and brackets Two runners recessed in its bottom panel protect the cabinet from scratching ...

Page 5: ... NL4 1 1 carry the LF signal pins 3 4 NL4 2 2 carry the HF signal The output connector pin assignment is set automatically when 2 Way Active mode is selected The input signal can be fed either to INPUT A or to INPUT B and is routed linked to both amplifier channels internally Passive operation Dual channel mode OUT A OUT B AMP B AMP A INPUT A B INPUT A B D12 Input Output routing Dual Channel Selec...

Page 6: ...sponse correction of CPL circuit The CPL Coupling circuit compensates for coupling effects between the cabinets when building closely coupled arrays CPL begins gradually at 1 kHz with maximum attenuation below 400 Hz providing a balanced frequency response when M4 cabinets are used in arrays of two or more The function of the CPL circuit is shown in the diagram opposite and can be set in dB attenu...

Page 7: ... the dispersion characteristics Altering the dispersion characteristics The dispersion characteristics of the driver and horn assembly can be rotated in increments of 45 for dedicated installation applications Proceed as follows Tools required Torque wrench with Torx nut 25 1 Undo the 10 screws holding the front grill and remove the front grill 2 Undo the screws holding the horn flange and the two...

Page 8: ... with D80 138 dB 140 dB SPLmax peak pink noise test signal with crest factor of 4 M4 loudspeaker Nominal impedance 8 ohms Power handling capacity RMS peak 10 ms 400 1600 W Nominal dispersion angle hor x vert monitor setup 50 x 70 Components 15 driver with neodymium magnet coaxial 1 3 exit compression driver with 3 coil and CD horn Passive crossover network Connections 2 x EP5 optional 2 x NL4 Pin ...

Page 9: ...h the provisions of the respective EC directives including all applicable amendments A detailed declaration is available on request and can be ordered from d b or downloaded from the d b website at www dbaudio com WEEE Declaration Disposal Electrical and electronic equipment must be disposed of separately from normal waste at the end of its operational lifetime Please dispose of this product accor...

Page 10: ...D2990 EN 01 03 2016 d b audiotechnik GmbH d b audiotechnik GmbH Eugen Adolff Str 134 D 71522 Backnang Germany Phone 49 7191 9669 0 Fax 49 7191 95 00 00_______ ...

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