Owner`s manual

OPERATION OF THE AMPLIFIER

After all proper connections have been made, you are now ready to turn the Atlas

amplifier on. The power on/off switch is on the front of the amp. Some

preamplifiers and sources can generate dangerous transients that can damage

loudspeakers. To avoid letting dangerous transients reach your loudspeakers turn

your system on in the following order:

1) Turn on all sources (CD, tuner, etc.) that you will be using.

2) Turn on the preamplifier.

3) Wait until preamp has stabilized.

4) Power up Atlas amplifier

5) Select listening source and play music

When powering down your system turn the amplifier off first.

Note – Important! After turning off the amplifier, wait at least one minute to turn

it back on. Do not turn it on then off and then on again in quick succession.

Doing this will not allow the power supply to discharge between on/off cycling

and may result in transient noises.

SETTING THE TUBE BIAS

Tools required: bias tool (provided with amplifier)

The output tubes (the big ones) need to be “biased’ with a grid voltage that

controls the flow of electrical current through the tube. Tube biasing on the Atlas

amplifier has been designed to be both simple and effective. On some amplifiers

biasing is done for two or more tubes simultaneously. With this method, the total

current flowing through the group of tubes may be correct, but the current flow

through any individual tube may vary significantly from the optimal value. With

the Atlas amplifier the bias is set individually for each tube so that the correct

operating point is assured. An added benefit to this approach is that, should a

tube fail prematurely, the single tube can be replaced without having to purchase a

matched set. Use the following procedure to set the tube bias:

WARNING – There are dangerous and potentially lethal voltages inside this

amplifier. Do not touch any part of the amplifier other than as described

below. If you are uncertain about any of these instructions, please contact

your dealer and have them bias the amplifier for you.