Ashly FA-125.4 Kullanım Kılavuzu - Sayfa 7
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FA Amplifier • Operating Manual
4
Front Panel Features
4.1
Level Controls
Each channel has its own level
control. This control also sets
the maximum level allowed
before any further attenuation
is applied using remote DC
level control. Level controls can
be disabled using the Lock/
Unlock DIP switch on the rear
panel.
4.2
Status LEDs
Each channel uses a single three-color status
LED to indicate signal, limit, mute, input
clipping, and protect.
•
GREEN (signal): The green LED lights when
signal reaches 45dB below full output.
•
AMBER (limit): The amber LED lights when
output has reached full power, and indicates
that automatic signal limiting is being used
to prevent output clipping.
•
RED (mute, input clipping, protect):
Mute: A status LED will be solid red when its
channel is muted. Muting occurs when level
controls are turned fully CCW, or when the
amplifier has entered pre-sleep mode after
15 minutes of inactivity.
Input Clipping: Status LEDs will flash red when
there is clipping detected at the input stage.
Protect: On 125W models, status LED pairs (ch.
1-2, 3-4) turn solid red to indicate the channel
pair is in protect mode, shutting down their
shared power supply. The 250W model uses a
dedicated power supply on each channel, so
protect mode applies to individual channels.
FA-125.4 shown, other models have similar features
4.3
Power Switch/LED
This switch is used for powering the amplifier
on or off, and can be disabled using the Lock/
Unlock DIP switch on the rear panel. Its white
LED indicates power on, off, pre-sleep, sleep, or
standby mode. The possible power switch LED
states are:
•
Fully off: The amplifier is completely off.
•
Fully lit: The amplifier is powered up.
•
Fully lit with all status LEDs solid red: The
amplifier is in pre-sleep mode, muting all
channels after 15 minutes of inactivity.
•
Brief flash every two seconds: The amplifier
is in Energy Star® sleep mode, resulting from
29 minutes of inactivity.
•
Flashing evenly @ 1Hz: The amplifier is in
standby mode due to contact closure.
Pre-Sleep Mode: The amplifier automatically
mutes all channels after 15 minutes of inactivity,
however remains powered up for instant wake-
on-audio. Input signal greater than -45dBu will
wake the amp from pre-sleep mode.
Energy Star® Sleep Mode: The amplifier will
power down after 29 minutes of inactivity, then
automatically wake-on-audio when it detects
input signal greater than -45dBu.
If the power switch is used to turn off the unit
while it is in sleep mode, the amplifier will enter
the full OFF state and disable automatic wake-
on-audio. The amplifier can only power up
again by pressing the power switch.
Sleep and pre-sleep mode settings are all part of
Energy Star function and are non user-adjustable.
Standby Mode: The amplifier is put into
standby mode using the rear panel contact
closure, either by connecting or disconnecting
the standby pin to ground, depending on the
standby polarity DIP switch setting. When placed
in standby mode, automatic wake-on-audio is
disabled. The standby contact closure circuit has
priority over automatic wake-on-audio.
4.4
Model Number
The first three numbers of the model number
express the power rating per channel of the
amplifier. The last number is the channel count.
7