L-ACOUSTICS LA15a 115V Manual V1.0 27/01/2003
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3. INTRODUCTION
Thank you for purchasing the L-ACOUSTICS LA15a power amplifier. This manual contains important
information on operating your power amplifier correctly and safely. Please take time to read this
manual in order to familiarize yourself with the many advanced features of this amplifier.
3.1 UNPACKING
Carefully open the shipping carton and check for any noticeable damage. Every L-ACOUSTICS
amplifier is tested and inspected before leaving the factory and should arrive in perfect condition. If
found to be damaged, notify the shipping company immediately. Only the consignee may institute a
claim with the carrier for damage incurred during shipping. Be sure to save the carton and packing
materials for the carrier's inspection.
It is also advisable to save the carton and packing material even if the amplifier is undamaged. Should
you ever need to ship the amplifier, always use the original packing.
3.2 FRONT PANEL
Figure 1: LA15a Front Panel
1. Carry/Protection Handle
Both handles can be used to carry the amplifier and the handles also provide protection for the front
panel. For fixed installation (or when rack front covers are too shallow) the handles may be removed
by unscrewing the retaining bolts 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 assist
in the setup of active loudspeaker systems. Input attenuation can also be used to reduce unwanted noise
from the input signal. See Section 7.4 for further details.
3. Over Temperature Protect Indicator
This indicator illuminates if the amplifier tries to operate above its maximum operating temperature
(90°
°
C). The indicator first comes on as a warning to either turn down the input level or check
amplifier ventilation. Beyond the maximum temperature the amplifier will mute the input signal. When
cooling fans have returned the output heat sinks back to normal operating temperature, the input
signal is un-muted.
4. Protect Indicator (VHF and short circuit)
This indicator illuminates when signals above 12 kHz are continuously present at full power at the output
terminals. If this occurs the input signal is muted and the process cycles until the VHF signal is no longer
present.
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