d&b audiotechnik M4, Руководство по эксплуатации

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Dispersion characteristics
The graphs below show dispersion angle over frequency of an M4
cabinet plotted using lines of equal sound pressure (isobars) at –6 dB
and –12 dB. The characteristics refer to monitor operation. When used
as a front-of-house system, the horizontal dispersion corresponds to the
vertical plot and vice versa.
Isobar diagram M4 horizontal , monitor setup
(vertical, front-of-house setup)
Isobar diagram M4 vertical, monitor setup
(horizontal, front-of-house setup)
Altering 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 opposite
screws at the 15" driver for the desired orientation.
3.
Rotate the horn to the desired orientation.
4.
Refit all screws and tighten them using a torque setting of
2 Nm.
5.
Refit the front grill and tighten all screws using a torque setting
of 4 Nm.
M4 Manual (1.8 en) Page 7 of 10