Sonodyne SBA 250P - Manual (Page 13)

Page 11
SMA/ SBA SERIES
OPERATION
IMPORTANT: All signal source equipment should be adequately earthed. This not only ensures your safety
but everybody else's as well. Faults can and do occur in mains connected equipment where the chassis can
become “live” if it is not properly earthed. In these instances, the fault in a “floating” (ungrounded) piece of
equipment will look for the shortest path to ground, which could possibly be your amplifier's input. If the
fault current is large enough, it will destroy the input to your amplifier and look for the next available path,
which maybe you!
Before making any connections to your new SMA/SBA series amplifier, observe the following:
∑ Ensure the mains voltage supply matches the label on the rear panel of your amplifier (±10 %).
∑ Ensure that the power switch is OFF.
∑ Ensure that all system grounds (earth) are connected from a common point. Avoid powering equipment
within a system from multiple power sources that may be separated by large distances.
∑ Check the continuity of all interconnecting leads to your amplifier; ensure that there are no open or
short-circuited conductors.
∑ Ensure that the power handling of your load (speakers) can adequately cope with the power output of
the amplifier.
∑ Before operating your new SMA/SBA Series amplifiers, ensure that:
∑ All the Level controls are at the “OFF” position (fully anticlockwise).
∑ The Tone controls are at the Centre position.
POWERING UP
REMEMBER: The amplifier should be the last piece of equipment that you turn on and the first piece of
equipment that you turn off.
We recommend turning the Level controls on your amplifier down when turning the unit on.
When switching the amplifier off, wait a couple of seconds before switching the amplifier on again. This
allows the ICS circuit to reset.
PHANTOM POWER
There is a Internal DIP switch to select the phantom power to each MIC Input individually. The phantom
voltage provided is 24V DC approx.
PRIORITY FUNCTION
The MIC/Line 1 input will always act as a priority over Input 2, 3 and 4. Whenever there is a signal given to
CH-1 input , it will mute the channels 2, 3 and 4 outputs.