AYRE MX-R - Manual (Page 17)

DC Offset
The Ayre MX-R incorporates a circuit to detect the presence of
DC at the output terminals which could be harmful to the
loudspeaker. In this situation, the status LED glows red and the
amplifier will not operate.
If the amplifier is linked to an AyreLink-equipped preamplifier
with an alpha-numeric display, a message indicating that the
amplifier has a DC offset will be displayed on the front panel of
the preamplifier.
If there are any unusual noises coming from the
loudspeaker, remove the AC power from the
amplifier immediately. Please return the unit to
your dealer or authorized service center.
To isolate the source of the problem, disconnect the audio input
cable from the MX-R amplifier and then press the front-panel
button. If the status LED glows green, then the problem is
either in the preamplifier or the source component. If the status
LED continues to glow red, the fault is in the amplifier. In this
case, remove AC power from the amplifier immediately. Please
return the unit to your dealer or authorized service center.
After correcting the suspected fault condition, a press of the
front-panel button is required to return the unit to the green
“Standby” condition. A second press of the button will restore
the unit to the blue “Operate” mode.
If the fault is still present when the front-panel button is
pressed the second time, the unit will immediately revert to the
red “DC Offset” mode.
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