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Maintenance (continued)
Weak or dull tones from your amp may indicate that the tubes are old or tired and need
replacement. The tubes in your amp are like tires on your car. They do wear out. If you notice
change in tone and tactile response from the amp, itÕs most likely that the power tubes needs to
be replaced. As advised earlier in this manual, replacement should only be done in complete
matched sets. Preamp tubes will last much longer than power tubes, but these should also be
checked occasionally. Preamp tubes tend to go micro-phonic and also produce undesired results
when old or not working properly.
Black Cat/ Wild Cat
The Black Cat is a 30 watt Class A and the Wild Cat is a 40 watt Class A amplifier. Class A
amps have their power tubes running at full power at all times unlike Class A/B. Class A/B
amps are push-pull amps which essentially means that the power tubes alternate turns handling
current. Many classic Marshall and Fender amps are Class A/B. Class A or Class A/B is neither
better than the other but they do offer differences in tonal character.
FRONT PANEL CONTROLS
Channel 1:
Volume
This volume pot controls the output level specific to Channel 1. With the Master Volume
switched ÒoutÓ this is solely responsible for the loudness of this channel. With the Master
Volume switched ÒinÓ this pot works in tandem with the Master. In that case, the higher settings
of this pot will give more gain and the Master will be used for overall volume.
Bass
The Bass EQ knob has been carefully tailored to cover the critical low-end frequencies in the
electric guitarÕs sonic range. Whether you need depth in your sound or low-end punch, this
control will allow you to dial in just the right amount of bass frequencies.
Treble
The Treble EQ knob allows you to control the amount of high-end frequencies that determine the
cutting character of your sound. For more sparkle and high-end definition turn this knob past
noon. For a warmer and rounder sound, turn this knob below noon in conjunction with turning up
the Bass knob.
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