Front Panel
Indicator
1.
PROT: This orange light activates when the amplifier enters protection mode due to potential issues such as speaker line
short circuits, open circuits, overload, or internal temperatures exceeding 55℃. It serves as a visual prompt for repairs and
will turn off once the issues are resolved. Each pair of channels has its own indicator.
2.
CLIPPING Status: This red light turns on if the input or output levels are too high, signalling potential clipping. Each pair of
channels is equipped with its own indicator.
3.
INPUT: This green light illuminates when an input signal is detected, indicating active reception. Each pair of channels has
a separate indicator.
4.
OUPUT: This green light indicates that the amplifier is outputting a signal. There are separate indicators for each pair of
channels.
5.
POWER Status: This blue light indicates that the unit is powered on, either by AC or DC.
6.
POWER Switch: Used to turn the equipment on or off.
Rear Panel
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1.
AC Power Socket: This device accepts an AC power cord for input voltages ranging from 110V at 50-60Hz, serving as the
main power input.
2.
24V DC Power Input: Features a 24V DC power supply input. This will automatically switch to standby mode when AC
mains power fails.
3.
Line Inputs (Channels 1-2): Supports both balanced and unbalanced audio inputs via phoenix connectors. Each of the two
channels has separate line inputs that can be managed independently. (Note: For unbalanced line inputs, connect "-" to
"GND".)
4.
Gain Control: Each channel has its own gain control for adjusting input sensitivity to achieve optimal response. (Note: This
gain control does not affect output volume. Amplifiers with volume control are available upon request.)
5.
70V Speaker Output (Pin1=COM & Pin3=70V+): Connect these outputs to 70V line loudspeakers, ensuring proper polarity.
Manage each of the two channels independently to avoid short circuits and prevent damage to low impedance speakers.
6.
8Ω Speaker Output (Pin2=COM & Pin3=8Ω): These outputs are designed for low impedance 8Ω loudspeakers. Like the
100V outputs, these are managed separately and require careful connection to avoid shorts and potential speaker damage.
7.
Auto-Standby (DIP1-2): The auto-standby feature is controlled by a two-channel DIPswitch. It activates and places the
amplifier in standby mode if no input is detected for 2 minutes, and reactivates upon input detection.
8.
High Pass Filter (DIP3-4): Enabled or disabled via a separate two-channel dipswitch, this function helps manage frequency
response for each channel independently.
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Control Interface
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