User guide

Over Temp indicator LED — This LED lights red when the ampliﬁer exceeds the

recommended ambient temperature for optimal lifetime. The LED will turn off after the

ampliﬁer has cooled down sufﬁciently.

Should the LED light, check the following:

 Verify the placement of the ampliﬁer allows for adequate ventilation and airﬂow.

 Avoid placing other equipment on top of the ampliﬁer.

 Verify the operating temperature is within the speciﬁed range.

Limiter/Protect indicator LEDs (channels 1 and 2) — These LEDs (representing

output channels 1 and 2) light red under four circumstances:

LIMITER/PROTECT

 When the output wiring is shorted together.

 When audio clipping occurs, the corresponding channel LED blinks once per clip

occurrence.

 When the ampliﬁer overheats, both LEDs are lit. The LEDs are not lit after the

ampliﬁer recovers from the overheated condition.

 When DC output is detected, the ampliﬁer is malfunctioning and the LED for the

corresponding channel is lit. The ampliﬁer requires servicing when this event occurs.

NOTE: These LEDs are also located on the rear panel.

Limiter/Protect indicator LED — This LED (representing the single output channel)

lights red under four circumstances:

 When the output wiring is shorted together

 When audio clipping occurs, the LED blinks once per clip occurrence.

 When the ampliﬁer overheats, the LED is lit. The LED is not lit after the ampliﬁer

recovers from the overheated condition.

 When DC output is detected, the ampliﬁer is malfunctioning and the LED is lit. The

ampliﬁer requires servicing when this event occurs.

NOTE: This LED is also located on the rear panel.

Signal indicator LEDs (channels 1 and 2) — These LEDs (representing input channels

1 and 2) light green only when an input signal is detected on the corresponding

channel.

SIGNAL

NOTE: These LEDs are also located on the rear panel.

Signal indicator LED — This LED (representing the input channel) lights green only

when an input signal is detected.

NOTE: This LED is also located on the rear panel.

XTRA Series Power Ampliers • Installation and Operation 5