SY-3A-40W
www.sy.co.uk
Using the SY-3A-40W Power Amplifier
Connecting the Outputs and Inputs
Firstly, decide on the output configuration you require as this affects how the speakers are wired to the
SY-3A-40W:
100V Line Output (UK / EU)
70V Line Output (US)
40W
40W
Second, decide on the microphone connector mode.
Do not switch to 48V phantom power mode while
the SY-3A-40W unit is powered up
as this may damage the power amplifier MIC / LINE input, the
microphone, or both.
48V phantom power mode should only be used with microphones that require it, such as some condenser
microphones.
Where phantom power is not required and the source signal level is not known, always begin with the
switch set to LINE and then try the MIC setting if no sound can be heard even after adjusting the controls
on the SY-3A-40W unit.
Once the two three-position switches have been set, the remaining audio sources should be connected
and the amplifier can be powered up.
Using the Front Panel Controls
The INPUT SEL switch toggles between the three Line inputs (2 analogue inputs and 1 optical input). In
each case, the MIC / LINE input will always be present at the output.
The next switch controls the volume of either the MIC / LINE input or the selected Line input. This switch
also provides control for the bass and treble settings for the speaker output.
Use the up (
) and down (
) buttons to adjust the value of the selected setting. The LED above the
button will flash for each press of the up or down button. If the LED above the button remains solid ON
then the maximum or minimum value has been reached.