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Safety precautions

Information regarding use of loudspeakers

WARNING!

Never stand in the immediate vicinity of loudspeakers driven at a high
level. Professional loudspeaker systems are capable of causing a sound
pressure level detrimental to human health. Seemingly non-critical
sound levels (from approx. 95 dB SPL) can cause hearing damage if
people are exposed to it over a long period.

In order to prevent accidents when deploying loudspeakers on the
ground or when flown, please take note of the following:

When setting up the loudspeakers or loudspeaker stands, make sure
they are standing on a firm surface. If you place several systems on top
of one another, use straps to secure them against movement.

Only use accessories which have been tested and approved by d&b for
assembly and mobile deployment. Pay attention to the correct
application and maximum load capacity of the 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 accessories for visible
signs of wear and tear and replace them when necessary.

Regularly check all load bearing bolts in the mounting devices.

CAUTION!

Loudspeakers produce a static magnetic field even if they are not
connected or are not in use. Therefore make sure when erecting and
transporting loudspeakers that they are nowhere near equipment and
objects which may be impaired or damaged by an external magnetic
field. Generally speaking, a distance of 0.5 m (1.5 ft) from magnetic
data carriers (floppy disks, audio and video tapes, bank cards, etc.) is
sufficient; a distance of more than 1 m (3 ft) may be necessary with
computer and video monitors.

M4 Manual

(1.8 en)    

Safety precautions - 1

Содержание M4

Страница 1: ...M4 Manual 1 8 en ...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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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