3-4 LONG THROW
When confi guring an array with three or four
HDAs per side, set the Array Mode Switch
on the top one or two boxes to the ‘3-4 LONG
THROW’ position. The LED below the switch
will illuminate red when ‘3-4 LONG THROW’ is
the chosen array mode.
The top box in a fl own three or four box
array typically has to reach an audience that
is much further away than those covered by the
bottom boxes. Since high frequency energy
decreases as it travels, audience members
positioned towards the rear of the venue will
commonly perceive less high end than those
located closer. ‘3-4 LONG THROW’ compensates
for this by boosting the top end so the audio
sounds smooth and even when it reaches those
audience
members.
Therefore, set the voicing mode switch to
‘3-4 LONG THROW’ on the top one or two boxes
in the array. In doing so, the high frequency
energy will reach the back of the venue, as
intended. Setting the bottom boxes to ‘3-4’ will
cover the audience converged more towards
the
front.
Be sure to utilize the EAW Resolution software,
too, as it helps visualize the high frequency
energy in the venue’s coverage. Finally, listen
for consistency by using your ears while walking
around the room.
4. POWER LIGHT ON
Press this switch in to turn on the front panel power
LED if a visual indicator is preferred. The LED below
the switch will light as a reminder.
If this switch is disengaged [out], and the HDA is
powered on, the LED on the front of the cabinet will not
light, nor will the LED below the switch.
5. SIG/LIMIT LED
This bi-color LED illuminates green whenever there is
signal present at the MAIN INPUT connector.
The HDA has a built-in limiter that helps to
prevent the amplifi er outputs from clipping or
overdriving the transducers. The SIG/LIMIT
indicator lights in yellow when the limiter is activated.
It’s okay for it to blink yellow occasionally, but if it
blinks frequently or lights continuously, turn down the
mixer’s main level until it only blinks occasionally.
Excessive limiting may lead to
overheating, which in turn trips the thermal
protect circuitry and interrupts the
performance. Pushing it too hard may also damage the
amplifi er and/or transducers. See ‘Thermal
Considerations’ on page 21 for more information.
6. THERMAL LED
The HDA is equipped with a thermal pro tec tion
cir cuit that mon i tors the in ter nal tem per a ture of the
amplifi ers and heatsink. If the tem per a ture ex ceeds a safe
op er at ing lev el, this indicator lights red and the input
sig nal is mut ed to allow the amplifi ers to cool. When the
tem per a ture cools to a safe lev el once again, the ther mal
pro tec tion cir cuit de ac ti vates, the THERMAL LED turns
off and the HDA returns to normal op er a tion.
When the HDA is in thermal protect mode, the unit
is still powered on despite the lack of output. If POWER
LIGHT ON [4] is engaged, the front panel power LED
will go out when in thermal protect mode.
Activation of the thermal pro tec tion circuit
is an indication that steps need to be taken
to avoid con tin ued ther mal prob lems. See
‘Thermal Considerations’ on page 21 for more
information.
POWER
LIGHT ON
MAIN
INPUT
LOOP
OUT
HDA
HIGH DEFINITION ARRAYABLE
POWERED LOUDSPEAKER
ARRAY MODE
1-2
3-4
3-4 LONG THROW
SIG/LIMIT
THERMAL
PARALLEL
1
2
3
4
6
5
14
HDA
HD
A