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• Switch on the amplifier last and switch it off first. Disconnect from the mains when not in use or when
maintenance activities are performed. Handle the power cable by the plug only.
• Keep power cables away from signal cables to avoid interference.
• Save this user manual for further reference.
4. Overview and use
Refer to the illustration on page 2 of this manual.
1
Clip LED
2
Gain control: channel A
3
Power LED
4
Protect LED
5
Gain Control: channel B
6
Clip LED
7
Power switch
®
8 Speakon
output
9
TRS input sockets
10
RCA input sockets
11
Ground lift switch
12 TRS output sockets
13 screw outputs
14 fuse holder
15 AC power socket
16 AC voltage selector
5. Notes
• Rack installation
This amplifier can be mounted in a 19" (483mm) rack that allows access to front and rear panel. Make
sure to leave enough space around the device for sufficient ventilation. Note that when mounting in a
rack, the heaviest devices should be mounted closest to the bottom.
Also note that it is not enough to mount the amplifier with 4 screws on the front; the rear must also be
attached to the side bars of the rack.
• Input cables
Using short cables will improve sound quality as high frequencies are absorbed by the cable. Longer
cables may also lead to humming and noise problems. If you do need longer cables, only use balanced
cables.
• Output cables
The high damping factor of the amplifier produces a clear sound reproduction. Long and thin cables will
influence this damping factor and thus the low frequencies in a negative way. To maintain good sound
quality, the damping factor should be around 50. When long cables are unavoidable, make sure they
are thick enough.
• Speakers
Connect your speakers using the Speakon
positive wire and the black terminator with the negative wire.
• Ground lift switch
This switch allows the signal ground or chassis ground to be separated in case of a ground conflict. For
safety reasons it is recommended to keep the switch in the GND FLOATING position unless ground
problems are experienced.
11.05.2010
VPASGx00
This LED flashes when the channel A output signal is distorted.
Adjust the volume of channel A.
This LED illuminates when the amplifier is switched on.
On when one of the internal protection circuits is active or no speakers are
connected. Switch off the amplifier and resolve the error condition .
Adjust the volume of channel B.
This LED flashes when the channel A output signal is distorted.
Press this button to start operation.
®
Speakon
speaker jack sockets.
for input signals using balanced ¼" TRS (stereo) jacks
for input signals using unbalanced phone (RCA) input jacks
Some connected equipment may present hum. This switch will remove the
signal ground and reduce the effect of the mains hum.
for output signals using stereo jacks
for output signals using bare wires
Only replace the fuse when the device is disconnected from the
Mains. Only use fuses of the same rating and power.
plug the AC power cord into this power socket
Make sure the setting matches your local mains voltage!
®
or screw
4
outputs. Connect the red terminator with the
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