RedPlate Magica Operations Guide
3
Gain2
– Like Gain1 (above) this control lets you set an alternate amount of break up character
you desire in your tone.
Rotate above zero to activate or it can be switched on or off with the
Gain2 button on the footswitch. Volume2 and Gain2 will not function if Volume1 is rotated off.
Treble Control
–
Adjusts the balance of high and low frequencies.
Middle Control
–
Controls the amount of Midrange frequencies, somewhat interactive with
the Bass Control.
Bass Control
– Sets the amount of low end,
somewhat interactive with the Middle Control.
MASTER SECTION
Master1 Volume
– This is an active control and actually adds gain at the higher settings. The
cleanest tones are achieved at settings below
2 o’clock.
REAR PANEL SECTION
IEC Module
– contains the main power switch, power cord inlet connector and the fuse drawer
which contains both the MAINS as well as the H.T. fuses. To access the fuse(s) use a small flat
blade screwdriver in the notch at the bottom of the power cord inlet connector, the drawer snaps
out in a rearward direction. The Magica can accept both the larger (3AG footprint) or smaller
European (5mm X 20mm) fuses. A time delay variety (SLO-BLO) is recommended for the MAINS
fuse. Left side fuse is a 1 amp H.T. fuse, this fuse is an extra layer of protection for the output
transformer and power transformer. If this fuse blows it generally indicates an output tube failure.
The right side fuse is the MAINS fuse,
observe back panel recommended fuse value.
Standby/Operate Switch
– This switch allows the tubes to warm up before operating the
amplifier. Wait 1 minute after power on to move it up to the operate position. For improved tube life
and performance do not leave the amplifier in Standby position for longer than 20 minutes (better to
just leave it in operate mode during performance intermissions).
50 WATT / 18 WATT Switch
– This switch does not really change the power output of the
amplifier but makes the amp break up much sooner in 18 watt position.
Bias adjustment and bias test point
– Allows external access for bias adjustment (see bias
procedure in the
Maintenance
section).
Impedance Select
or Ω
- Set this to the total impedance of all attached speakers.
Speaker Jacks
– The MAIN and EXT jacks are wired in parallel. The MAIN jack must be used
first because it has a protection device. ALWAYS HAVE A SPEAKER CONNECTED TO AVOID
PERMANENT AMPLIFIER AND OUTPUT TUBE DAMAGE.
