Levels; Limiters - Martin Audio WX3A User Manual

<
CONTENTS
7

LEVELS

Each output level may be adjusted from -ve infinity to +6dB relative to its
nominal level. The system-specific plug-in boards include mid and high
frequency band attenuation to provide level matching for approximate
system balance when all controls are set to 0dB (assuming the use of
amplifiers with identical gains). It should be noted, therefore, that front
panel calibration would not necessarily indicate absolute band gains within
the WX3A. When setting up a system for the first time, the WX3A band
levels should be adjusted for desired balance and the settings noted for
future reference.
8

LIMITERS

The WX3A system controller features fast attack limiters to prevent power
amplifiers from clipping, thus providing speaker protection whilst preserving
full system headroom. The limiters are set by adjusting the limit threshold
switches to the value that matches the input sensitivity of the amplifier. A
system operated in this way, with amplifiers having a power rating as
recommended for the particular Wavefront system and used by
experienced professional sound engineers, should be sufficiently protected
from overdriving. Amplifier gain controls should normally be set at
maximum. Triggering of the limiter is indicated by a red LED on the front
panel.
Recommended amplifier powers for Wavefront Series loudspeakers are as
follows:
W1
W2/W3
W3P
WS2A
Limiter threshold settings may be altered by removing the top panel of the
WX3A case (two screws each side) to gain access to the main circuit
board.
The limiter threshold is set by a 16-way switch on each band. This is
located on the main circuit board behind each corresponding band level
control. The switches are labelled as follows:
BAND 1
BAND 2
BAND 3
BAND 4
>
PRINT
300-400 watts per channel into 4 ohms
400-600 watts per channel into 4 ohms
550-800 watts per channel into 4 ohms
550-800 watts per channel into 4 ohms
S 1
S 2
S 3
S 4
Martin Audio – WX3A System Controller
13
GUIDES