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AQ-3 Operating Instructions
Page 13
Operating Your Amplifier: Front Panel Controls and Indicators
1: Power Switch: This single pole switch turns the amplifier fully off (but does NOT isolate it
from the mains supply).
2: Power LED: This indicates when the amplifier is active. This does NOT indicate the
presence of a mains supply when the power switch is OFF.
3: Signal Meter: These LED bar graphs show instantaneous level on each channel to indicate
proximity to the limiter threshold. Note that if the PRC system is in operation on any channel,
this
will
affect
the
readout
shown
on
the
respective
meter.
The red LED in the meter will illuminate when the limiter threshold has been reached and
limiting is occurring.
4: Attenuation Controls: These are analogue controls allowing precise level settings. Note
that in bridged (mono) mode some controls may be inactive.
5: Link LED: This indicates if the channel is linked to its immediate
neighbour.
The link
switches are on the rear panel – see page 15 for details.
6:
PRC LED:
This illuminates if the Power Reduction Control has been enabled on the
respective channel. PRC switches are on the rear panel – see page 15 for details.
7:
Bridge LED:
This illuminates when a channel pair have been switched into bridged
(mono) mode (channel A+B or C+D). Note that the partner channel's LEDs and controls are
disabled when a pair of channels are bridged. Bridge switches are on the rear panel – see
page 15 for details of how to connect your speaker to a bridged channel pair.
8: A/P (Auto Protect) LED: If a condition exists, either internally or externally, that could
cause damage to either the amplifier or the speakers, the protection circuit will disengage the
outputs and the A/P LED will illuminate. The amplifier will continue to be monitored and
depending on the type of fault, will either reset after the fault has cleared or require manual
resetting by switching off at the mains switch and then on again after a few seconds.
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