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spectrum is divided into three bands, the Bass, Mid, and Treble. The
Bass and Treble are shelving type filters and the Mid is a bandpass
filter. These controls give you broad general control of the shaping of
your tone. This is different than the more narrow control offered by the
Semi-Parametric.
MASTER LEVEL CONTROL
This control sets the final output level to the amplifier. For general
operation the control will normally be set at between 9:00 and 1:00.
HEADPHONE OUTPUT/ Aux. line out
This jack provides the output for headphones for practicing. If you switch
off the internal speaker you can use your amplifier to rehearse with just
the headphones. It can also be used as a Aux. line level output.
D.C. INDICATOR
This indicates that the D.C. power supplies are operating properly and
the amplifier is turned on.
BACK PANEL FEATURES
A.C. POWER INLET/ FUSE
This is where you plug in you A.C. line cord . This is also where the fuse
is located. For your unit you need a 3 Amp. 5x20 MM slow blow type. In
Europe use a 1.5 Amp or 1.6 Amp fuse slow blow and the appropriate
AC connector for the country you are in. Make certain that your unit is
set for the correct voltage of the country you are in.
INTERNAL THERMAL PROTECTION SYSTEM
Your unit is fully protected by an automatic thermal safety system that
meets the UL-813 standard for safety . If your unit it played to hard and
to long and it accumulates to much heat load. If this happens your unit
may temporarily go into the thermal standby mode. This is a normal
operation of the safety system. In the stand by mode the unit will remain
