4. N OME NCLATUR E AND F UN CTI ONS
4.1 FRONT PANEL
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1. Volume potentiometer (CH1~CH4)
The potentiometer controls the input power of the amplifier, and the normal adjustment range -30db
~+40dB. When the potentiometer is rotated clockwise, the volume will be gradually increased. In
reverse, the output level will decrease.
2. POWER SWHIT (power switch)
Switch up, power on, switch down, power off.
3. POWER (power indicator)
When the power is turned on, the power indicator lights up to indicate that the machine is in working
state. When the power is turned off , the power indicator goes off.
4. Signal indicator (SIG)
When there is a music signal input, this signal indicator lights up and the volume potentiometer is
turned on; its brightness changes according to input music signal sensitivity.
5. PROT (protection indicator)
This indicator lights on when the protection function is open. If the speaker wire is short-circuited or
the sum of the connected speaker power is bigger than 1.5 times of the rated power, it will cause the
circuit protection and disconnection of the amplifier output and the protection indicator will be on
(The signal indicator is only used to indicate the input of the music signal. In the protection state, the
signal indicator still lights up according to the input signal sensitivity.) This indicator is off when the
machine is working normally.
6. Signal peak indicator (PEAK)
When the indicator light is on, the machine has reached the peak of rated power output. In order to
avoid serious distortion or peak clipping, the potentiometer should be appropriately adjusted to
reduce the volume.
7. 100V: 100V mode status indicator.
8. 4~16Ω: Constant resistance 4~16Ω mode status indicator.
POWER
OFF
ON
CH2CH1
PEAK
SIG
PROT
100V
4-16
Ω
MIN MAXMIN MAX
CLASS-D AMPLIFIER
T-2240DS
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