outlets. The power inlet will be labeled with the voltage your amplifier is wired to
accept, which will vary depending on the country where it is intended to be used.
Serial Number
Your unit's serial number will be located just beneath the power
inlet.
FUSE
This is the fuse holder for the mains safety fuse. If the fuse blows replace
only with a fuse of the labeled type, which will vary depending on the country of
intended usage. If the amplifier blows more than one fuse in a short period of
time, this indicates a problem with the amplifier. Please refer your amplifier to
Dusky Electronics or to a qualified technician for repair.
HIGH/LOW
When this switch is in the
up
position, the amplifier operates at full
power and can deliver up to 32 watts of power to an attached speaker load. When
the switch is in the down position, available output power is roughly ¼ or 8 watts.
IMPEDANCE
This switch can be turned with a flathead screwdriver, coin, or
heavy guitar pick. It should be set to match the impedance of the speaker load
attached to the amplifier. See the section on speaker load below.
SPEAKERS
One or two speaker cabinets may be plugged into these speaker
outputs, which accept standard ¼” plugs. If only one speaker cabinet is used, it
should be plugged into the output labeled
MAIN
.
Tone Controls
Bass and Treble
The first preamp stage includes the
Bass
and
Treble
controls based on the
classic "James" tone stack. This configuration allows independent control of bass
or treble, allowing either range to be cut or boosted without affecting the other
frequency range.
Flat EQ is achieved with both controls set at approximately 11 o'clock.
Middle
The
Middle
control is located in the next preamp stage, completely isolated from
the Bass and Treble controls. The Middle control is a passive midrange filter
tuned for the lowermiddle frequencies that are often described as sounding
“muddy.”
With the Middle knob set fully clockwise, very little midrange is being cut. As the
control is rotated counterclockwise, progressively more lower midrange is
scooped out, allowing you to go from very warm sounding to very scooped.