5
Ⅰ Panel Descriptions
FRONT PANEL
1. Gain Level Attenuator
Establishes the required input level from -12dB to 0dB (0dB=0.775V).
2. Output Level Indicator
This level meter indicates the Amplifiers output level.
3. Protect LED
If protect conditions should occur, such as a excessively high operating temperatures with short in a output terminals cables or power on and off
muting times, this LED will light and the amplifier will stop operation until the protect condition is corrected.
4. Power Indicator LED (AC AND DC)
The VP240D/VP120D has two power indicators. Red LED is turn on by AC power and Green LED is turn on by DC input power. Either LED will
light when the “ON” status of the unit.
5. Power Switch
REAR PANEL
400Hz
COM COLD HOT
COM
4ohm
8ohm
70V
100V
6. Power Receptacle and internal AC FUSE
This is a standard 3-prong IEC power connector. Connect the detachable line cord (included in the box) to the power receptacle, and plug the
other end of the line cord into an AC outlet. Standard IEC-type power cord connection. The internal AC Fuse is equipped with 10A 250V fast-blow
fuse for AC input 110Vac to 120Vac countries. Other countries are 5A 250v Time-Lag FUSE for 220Vac-240Vac.
7. DC Input Terminal and internal DC FUSE
This is a standard 5-way binding post connector. Connect the + 24V DC Battery(100A Type) source to these terminal. Red(+) connects to
battery's po), and Black(-) connects to battery's negative(-) side. The internal DC Fuse is equipped with 20A 35V Automotive type fuse for
DC 24V input.
8. Remote Power on/off Connector.
These connectors are for external remote power on and off. The external on/off controls will be effected when the main's power switch is off
position.
9. High Pass Filter Switch.
This 400Hz high pass filter activates for reduce internal resonances and protect to speakers from damage caused by excessive low frequency
transients.
10.Ground Lift Switch
This switch provides connection or disconnection between AC power "earth" ground and amplifier's ground to prevent ground loops noise. Under
normal circumstances, this switch is set to "Frame" position.
11.Audio Input Jacks (XLR Balanced)
These jacks connect to pre-amplifier audio outputs or mixing console outputs.
12.Link Connector (XLR and Screw Terminal)
These jacks connect to added P.A amplifiers input jacks.
13.Speaker Output Terminals
The VP240D/VP120D is utilize five screw terminal for speaker connection. One terminal is common output terminals, two terminals are 4 ohm, 8
ohm for conventional operating, and another two terminals are 70V,100V outputs for high impedance speaker operating.
Make certain the combined impedance of the speakers is less than the rated impedance.
Please refer to the specification page 10.
