Marshall Amplification JCM600 - Manual (Page 4)

ENGLISH
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pickups will require extra bass and middle to give the sound more body, but
humbuckers may well require less middle and extra treble to cut through.
Vintage Overdrive
Switch to the Overdrive channel which is indicated by the Red L.E.D. Again
pickups will obviously influence settings but you will probably find that gain
settings of around 5 or 6 are quite adequate, the key however is to increase the
master volume level. As our vintage amps didn’t really have a lot of pre-amp
gain guitarists used to crank the volume up to be heard which resulted in the
natural classic Marshall overdrive roar. Alternatively the Clean Channel with its
volume on maximum gives a very satisfying vintage type overdrive.
As far as tone settings go we would suggest that you start with the tone
controls set at about 5 and then adjust to taste from there. The selection of tone
settings for single coil or humbucking pickups will follow the same general
pattern as for the clean sound.
Modern Hi-Gain
Switch to the Overdrive channel indicated by the Red L.E.D.
Turn the gain up to full and set the volume for the desired level. Tone controls
are set to taste, though probably with the Middle control lower than the Bass
and Treble controls particularly to maintain the definition when using
humbucking pickups.
The best advice we could really offer is to simply experiment and above all
enjoy the pure valve tone of your Marshall JCM 600 amplifier.
1) Footswitch Jack
Jack socket for connection of P801 Footpedal
for channel switching.
2) Push Channel Switch
Push switch for panel switching of the
channel. The push switch is inoperative when
the footswitch is connected.
3) Input Jack
Jack socket for the input of the guitar.
4) Volume Control
Controls the Volume of the Clean channel.
5) Bass Control
Controls the lower frequencies or bottom end
in the tone of the Clean channel.
6) Middle Control
Controls the middle frequencies and fatness of
the tone of the Clean channel.
7) Treble Control
Controls the upper or treble frequencies in the
tone of the Clean channel.
8) L.E.D.
Indicates channel. Green-Clean. Red-
Overdrive.
9) Gain Control
Controls the amount of Gain on the Overdrive
channel.
10) Volume Control
Controls the volume of the Overdrive channel.
11) Bass Control
Controls the low end frequencies in the tone
of the Overdrive channel.
12) Middle Control
Controls the middle frequencies in the tone of
the Overdrive channel.
JCM 601, 602 & JCM600 Head
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