Inter-m DPA-50E Operation Manual page 7

The protection circuit is grouped as CH1/CH2, CH3/CH4, CH5/CH6 and CH7/CH8.
For instance, if speaker output terminal of CH1 is misconnected or excessively input, PROT LEDs
of CH1 and CH2 are turned on.
3. VOLUME CONTROL
Volume adjustments are made. Turn clockwise to increase the volume level.
4. FAN VENTS
The air circulation passage to prevent overheating of the device, please do not obstruct the flow as air flows
from front to back.
5. POWER SWITCH
Push on/off switch. When Power switch is on, BLUE LED will illuminate.
DIGITAL POWER AMPLIFIER
DPA-50E 5