Guided Tour - Front Panel - Samson Power Amplifier Servo 201a Owner's Manual

Guided Tour - Front Panel

1 2 3 4 5 6 7 2 1
8 9 10 8 9 10
1: Channel input level controls - These 41-position detented knobs allow you to adjust the input level of the signal arriving at
the rear-panel input jacks (see #4 and #5 on the following page). At their fully counterclockwise position, the signal is attenuated
by 70 dB (essentially completely off ). At their fully clockwise position, the signal is at unity gain (that is, no attenuation). When
+4 dBu of signal arrives at the input jacks and the Channel input level controls are set to their fully clockwise "0 dB" position, the
Servo 201a delivers full power output.
2: LED meters - These ten-segment LED meters continuously monitor the power output level for the corresponding channel. For
example, when the -8dB segment is lit, the amplifier is operating at 20% of it's maximum power. When the -4dB segment is lit,
40% of it's maximim power, 0dB segment, 60% power, +2 segment lit, 80% power, +4 segment lit, 100% power. When the PEAK
LED lights, the amplifier is producing a distorted (clipped) output signal. For the best signal-to-noise ratio, the PEAK segment
should light occasionally during maximum levels: If it lights frequently, the amplifier may be overloaded. Try turning down the
input level controls. If the amplifier now delivers too low an output level for your application, consider using Bridge mode (see
the "Bridge Mode" section on page 7 in this manual for more information).
3: Headphone jack - Connect any standard stereo headphones to this jack (via a standard 1/4" TRS plug) for private monitoring
of the final output signal. NOTE: The Servo 201a speaker outputs are not automatically muted when headphones are inserted
into the Headphone jack—to monitor incoming signal in privacy, press the Speaker on/off switch (see #7 below) so that it is out
(in its "up" position)—the Speaker on/off LED will go off. The built-in Servo 201a headphone amplifier delivers 400 mW into 100
ohms.
4: Power LED - Lit whenever the Servo 201a is powered on.
5: Power switch - Use this to power the Servo 201a on or off.
6: Speaker on/off LED - Lights when the Speaker on/off switch (see #7 below) is pressed in and the Servo 201a is delivering sig-
nal to its rear panel output terminals (see #3 on the following page).
7: Speaker on/off switch - When pressed in (the normal position), the Servo 201a delivers signal to its rear panel output ter-
minals (see #3 on the following page). When this switch is out (in its "up" position), outgoing signal is muted, allowing personal
monitoring of incoming signal through connected headphones (see #3 above).
8: Idle LED - Lit when there is signal present at the Servo 201a's input.
9: Protect LED - When illuminated, the Servo 201a is in protection mode and the outputs temporarily shut off.
10: Peak LED - Lit whenever the Servo 201a is producing a clipped output signal.
3