Bias Switch - Decware SE84UFO Owner's Manual

OWNERS MANUAL for Model SE84UFO PAGE 7
CONTROLS

BIAS SWITCH

SOURCE SELECTOR
VOLUME CONTROL
Volume The volume control should be all the way down (counter-clockwise)
whenever the amplifier is first turned on and then slowly raised to the
desired listening level.
There are two small toggle switches located at the front of the
amplifier just in front of the input tube. The leX switch selects from
source A and source B. The right switch adjusts the amount of input
tube bias.
Bias Switch
Tube bias simply means how much current the tube is allowed to use.
In this amplifier, the 6N1P input tube and compa>ble alternate such
as 6922, 6DJ8, 7DJ8, 6N23P, 6H1N can all be operated at more than
one bias point resul>ng in different sounds from each. There is no
right or wrong sehng for any of the above men>oned tubes. Simply
listen to the amp with both sehngs and select the best one to your
ears.
NOTE: When opera>ng the bias switch while the amplifier is on, you
will hear a "pop" sound come from your speakers. This is normal and
harmless to your speakers, so it is an accepted prac>ce. The volume
control will have no effect on the loudness of the "pop" when you
operate the bias switch.