L-ACOUSTICS LA 24 MANUAL Version 2.2
17/11/08 4
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FRONT PANEL
Figure 1. Front panel
1.
Carry/protection handle
Both handles can be used to carry the amplifier and they also act as protection for the front
panel. If desired, they can be removed by removing the screws located behind the front panel.
2.
Input level attenuators
These controls are used to alter the signal level entering the amplifier. They are calibrated in
dB to help set up active loudspeaker systems or to cut down on unwanted noise from the
input signal (see page 14).
3.
TEMP indicator
This indicator is lit if the amplifier tries to operate above its maximum operating temperature
(90
o
C). The indicator first comes on as a warning to either turn down the input level or check
the cooling arrangements after which point the amplifier will mute the input signal. When the
cooling fans have returned the output heat sinks to the normal operating temperature the
input signal is unmuted.
4.
VHF protect indicator
This indicator lights when high level, high frequency signals (above 12 kHz at full power) are
present at the output terminals. When this happens the input signal is muted and the process
cycles until the VHF signal is no longer present (see page 16-17).
5. CLIP indicator
This indicator shows when the amplifier output is clipping or limiting. LED dynamics under clip
conditions depend on whether the Clip Limiter is engaged or bypassed (see page 16):
•
When the clip limiter is engaged, the clip indicator flickers briefly (limiting)
•
When the clip limiter is not engaged, the indicator lights for a longer period (clipping).
6. Fan grill filter
Two removeable grilles with foam filters are located on the front panel to prevent dust from
entering the amplifier.
7. Power switch
This is used to turn on/off the amplifier (see page 14).
