Engl E633, Operator'S Manual

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Stand By
Power amp Stand By switch: Use this switch to silence (0 position) the amp when you take a longer break.
The amp‘s tubes stay nice and toasty, and the amp is ready to roll immediately when you ramp it back up to
full power. The Stand By switch is also well-suited for silencing the amp for brief breaks, for instance when
you‘re switching guitars.
Power
Mains power on/off.
Please note: ensure that the Stand By switch is set to Stand By (0 position) before you switch the amp on.
Let the tubes heat up for about 30 seconds before you activate the power amp. This procedure conserves
the tubes.