Marshall Amplification Musical Instrument Amplifier JCM600 User Manual |
J CM Valve Com bos
& J CM 600 Valve Head.
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WARNING!
Please read the following list carefully.
A. ALWAYS fit a good quality mains plug conforming to the latest B.S.I. standards where
necessary (UK only).
B. NEVER attempt to by-pass the fuses or fit ones of the incorrect value.
C. NEVER attempt to replace fuses or valves with the amplifier connected to the mains.
D. DO NOT attempt to remove the amplifier chassis, there are no user serviceable parts.
E. ALWAYS have this equipment serviced or repaired by competent qualified personnel.
F. NEVER use an amplifier in damp or wet conditions.
G. DO NOT switch the amplifier on without the loudspeaker connected.
H. ENSURE that any extension cabinets used are of the correct impedance.
I. PLEASE read this instruction manual carefully before switching on.
WARNING : This apparatus must be earthed!
WARNING : Do not obstruct ventilation grille and always ensure free movement of air around
the amplifier!
Range Introduction
JCM 600
Marshall Am plification has been inextricably linked with valve am plification
since our very beginning in 1962. Products such as the original Bluesbreaker
com bos, J TM 45 and Super-Lead heads were all destined to be, and have
becom e, classics in their own right.
All of these special Marshalls produced their m agical tone by driving the guitar
through an all valve pre-am p into a pure valve power-am p. The J CM 600 series
carry on this grand tradition but m eet the dem ands of contem porary guitarists
by providing features such as channel switching, reverb, effects loop and
speaker em ulated output.
Us in g Yo u r J CM 6 0 0 Am p lifie r
Your J CM 600 Valve com bo or head is easily capable of producing a wide
range of usable quality tones, from glassy vintage clean, Bluesbreaker type
singing lead and crunchy chord work to full blown m odern high gain crush.
What’s m ore the controls are sim ple and intuitive to use giving you instant
access to m em orable Marshall tones.
Whilst one should always bear in m ind that taste in tone is a very subjective
m atter, the following suggestions will give you a good starting point for getting
som e great sounds from your J CM 600 am plifier.
Cle a n
Make sure you select the Clean channel which is indicated by the green L.E.D.
The strength and height of your pick-ups will have a great influence on the level
you should set the volum e on this channel before overdrive sets in. Generally
speaking the volum e control should be set below half way for totally clean
sounds.
The tone network should be set with all three controls at 5 initially, then
adjusted to suit the type of guitar and sound required. Generally single coil
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pickups will require extra bass and m iddle to give the sound m ore body, but
hum buckers m ay well require less m iddle and extra treble to cut through.
Vin t a g e Ove rd rive
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
m aster volum e level. As our vintage am ps didn’t really have a lot of pre-am p
gain guitarists used to crank the volum e up to be heard which resulted in the
natural classic Marshall overdrive roar. Alternatively the Clean Channel with its
volum e on m axim um 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 hum bucking pickups will follow the sam e general
pattern as for the clean sound.
Mo d e rn Hi-Ga in
Switch to the Overdrive channel indicated by the Red L.E.D.
Turn the gain up to full and set the volum e 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 m aintain the definition when using
hum bucking pickups.
The best advice we could really offer is to sim ply experim ent and above all
enjoy the pure valve tone of your Marshall J CM 600 am plifier.
JCM 601, 602 & JCM600 Head
Front Panel Functions
1) Footswitch J ack
7) Treble Control
Jack socket for connection of P801 Footpedal
for channel switching.
Controls the upper or treble frequencies in the
tone of the Clean channel.
2) Push Channel Switch
8) L.E.D.
Push switch for panel switching of the
channel. The push switch is inoperative when
the footswitch is connected.
Indicates channel. Green-Clean. Red-
Overdrive.
9) Gain Control
3) Input J ack
Controls the amount of Gain on the Overdrive
channel.
Jack socket for the input of the guitar.
4) Volum e Control
10) Volum e Control
Controls the Volume of the Clean channel.
Controls the volume of the Overdrive channel.
5) Bass Control
11) Bass Control
Controls the lower frequencies or bottom end
in the tone of the Clean channel.
Controls the low end frequencies in the tone
of the Overdrive channel.
6) Middle Control
12) Middle Control
Controls the middle frequencies and fatness of
the tone of the Clean channel.
Controls the middle frequencies in the tone of
the Overdrive channel.
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correct type and rating. It is a wise precaution
to always carry spares.
13) Treble Control
Controls the upper or treble frequencies in the
tone of the Overdrive channel.
2) Mains Input
Connects the amplifier to the mains power
supply.
Please Note
The Tone Controls are interactive and
adjusting one can effect the relative amounts
of the others. Experimentation is the best way
of finding your own personal favourites.
3) Parallel FX Loop Return J ack
Jack socket for connection from the output of
an external effects processor.
14) Parallel Effects Mix Control
Please Note
Governs the amount of effected signal in the
overall tone when used in conjunction with
external effects through the parallel loop (see
items 3 and 4 of the JCM 600 rear panel
functions).
A parallel FX Loop is best suited for use with
external effects processors which require a
certain amount of dry or uneffected signal in
the overall tone. Time based effects such as
Delay and Chorus are typical examples of the
effects best suited to this type of Loop.
15) Clean Reverb
Controls the amount of Reverb on the Clean
channel.
4) Parallel FX Loop Send J ack
Jack socket for connection to the input of an
external effects processor.
16) Overdrive Reverb
Controls the amount of Reverb on the
Overdrive channel.
5) Series FX Loop Return J ack
Jack socket for connection to the output of an
external effects processor.
17) Volum e
Controls the overall volume of the combo.
6) Series FX Loop Send J ack
Jack socket for connection to the input of an
external effects processor.
18) Standby Switch
Controls the H.T. supply to the valves and
allows the valves to remain heated when not
in use.
Note: The Series Loop is best suited to effects
that require no dry signal such as
Compressors or Graphic Equalisers.
19) Power Switch
7) D.I. Output
On / Off Switch for mains power to the
amplifier.
The JCM 600’s D.I. Out is switchable
between a speaker Emulated signal (pre the
power amp), and a non Emulated (post the
power amp ) signal.
Please Note
To prolong the life of the valves it is always
advisable to switch on the Mains Power
Switch (item 19) about 2 minutes before
switching on the Standby (item 18).
The Emulated Output captures the tonality of
Vintage loudspeakers like no other D.I.
furthermore this output is unaffected by the
Master Volume controls therefore allowing
the JCM 600’s output to be turned off whilst
still providing silent recording facilities.
This allows the valves to heat up to full
working temperature before use. On
switching off, the Standby should always be
switched before the Power Switch.
The D.I. Output is via an XLR type connector
which allows this system to be run into either
(a) a line level balanced input (b) a line level
unbalanced input or (c) a low level
unbalanced input.
JCM 601, 602 & JCM600 Head
Please Note
Rear Panel Functions
Refer to the JCM 600 XLR Out diagrams
(Below) for correct connections.
1) Mains Fuse
Protects the amplifier and mains supply in the
8) Pre/Post Switch
✪
event of a fault.
Allows Line Out selection between a speaker
Emulated signal (pre the power amp) and
non-emulated (post the power amp).
Check the label on the back of the amp for the
correct value. Always replace fuses with the
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4
9) Presence Control
Note
This Master Presence control adjusts the
amount of top end frequencies in the overall
tone - adding crispness and bite.
The JCM 600 combos and head will deliver
60 Watts into either one or two 16 Ohm
speakers, ie. 16 or 8 Ohm total impedance.
The unit should not be driven into a load of
less than 8 Ohms.
10) Speaker Output
On combo formats of the JCM 600 this jack
is for connection to the internal 16 Ohm
speaker. On the JCM 600 Head this socket is
for connection to an external speaker cabinet,
such as the purpose built JCM C410A
compact 4x10” angled cabinet and/or the
JCM C410B compact 4x10” base cabinet.
If you unplug the internal loudspeaker in a
JCM 600 combo it is possible to connect a
single 8 Ohm cabinet to the extension
Speaker Output only. However, when the
internal speaker is connected only a 16 Ohm
extension cabinet may be used.
It is important to follow these instructions as
failure to do so may lead to the amp running
into the wrong impedance, which will
ultimately cause damage.
11) Speaker Output
For connection to an external 16 Ohm
speaker (The Marshall JCM C12 1x12” and
JCM C212 2x12” cabinet are designed for
use with JCM 600 combos).
On the JCM 600 head this output could drive
a second JCM C410A or JCM C410B
cabinet.
3
2
1
3
2
1
3
2
1
3
2
1
XLR Channel Input
On Mixer
(Note: Line Level-
Approx OdBV)
A
2 Core Screened Balanced Mic Lead
NC
3
3
2
1
2
1
B
C
Unbalanced XLR to Jack Screened Lead
Jack Plug
Line Level Jack Input On Mixer Etc.
3
3
NC
2
1
2
1
Unbalanced XLR to Jack Screened Lead
Jack Plug
Low Level Jack Input On Mixer (ie
Mic Input)
✪
J CM 600 XLR Out diagram
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5
J CM6 0 0 He a d & J CM6 0 1 Co m b o Fro n t P a n e l
STANDBY
POWER
VALVE GUI TAR AMPLI FI ER
OVERDRIVE
MASTER
JCM600
0
0
FOOT
INPUT
4
6
4
6
4
6
4
6
8
12
20
4
6
4
6
4
6
4
6
4
6
4
6
4
6
4
6
SWITCH
—
—
—
—
—
—
—
—
—
—
—
2
4
RED
8
8
PUSH
0
10
0
10
0
10
0
10
0
0
10
0
10
0
10
0
10
0
10
0
10
0
10
0
10
CHANNEL
GREEN
1
1
(Parallel Mix)
CLEAN
REVERB
OVERDRIVE
REVERB
CLEAN
VOLUME
BASS
MIDDLE
TREBLE
GAIN
VOLUME
BASS
MIDDLE
TREBLE
EFFECTS
VOLUME
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
J CM6 0 2 Co m b o Fro n t P a n e l
STANDBY
POWER
VALVE GUI TAR AMPLI FI ER
OVERDRIVE
MASTER
JCM600
0
0
FOOT
SWITCH
INPUT
4
6
4
6
4
6
4
6
8
12
4
6
4
6
4
6
4
6
4
6
4
6
4
6
4
6
—
—
—
—
—
—
—
—
—
—
—
2
4
8
8
PUSH
RED
0
10
0
10
0
10
0
0
20
0
10
0
10
0
10
0
10
0
10
0
10
0
10
0
10
10
CHANNEL
GREEN
1
1
(Parallel Mix)
CLEAN
REVERB
OVERDRIVE
REVERB
CLEAN
VOLUME
BASS
MIDDLE
TREBLE
GAIN
VOLUME
BASS
MIDDLE
TREBLE
EFFECTS
VOLUME
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
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J CM6 0 1 & 6 0 2 Co m b o Re a r P a n e l
Presence
MAIN S FUSE
MAIN S IN PUT
PARALELL
FX LO O P
SERIES
FX LO O P
D.I.O UTPUT
60 watts RMS into 8/ 16
.
CAUTION!: TO REDUCE THE RISK OF FIRE REPLACE FUSES WITH THE
WARNING!: SHOCK HAZARD. DO NOT OPEN. TO REDUCE THE RISK OF FIRE
OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
THIS APPARATUS MUST BE EARTHED.
Pin 1—OV, Pin 2—High, Pin 3—Low
120V—T3A
SAME TYPE AND RATING ONLY. DISCONECT SUPPLY CORD BEFORE
O UTPUT
230V—T1.6A
4
6
Emulated
CHANGING FUSE. TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT
REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING
TO QUALIFIED SERVICE PERSONNEL.
Return
Send
Return
Send
Internal
Extension
AVIS!: RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR. POUR EVITER LES
RISQUES D’INCENDIE ET DE DECHARGES ELECTRIQUES, N’EXPOSEZ JAMAIS CET
APPAREIL A L’HUMIDITE OU A LA PLUIE.
PWR Amp
Line Out
2
8
ATTENTION!: POUR EVITER LES RISQUES D’INCENDIE UTILISER UN
FUSIBLE DE MEME TYPE ET DE MEME CALIBRE. DEBRANCHER AVANT DE
REMPLACER LE FUSIBLE. POUR EVITER LES RISQUES DE DECHARGES
ELECTRIQUES, NE PAS OUVRIR LE COUVERCLE. CET APPAREIL NE COMPORTE
AUCUNE PIECE SUSCEPTIBLE D’ETRE REPAREE PAR
CONNECTER CET APPAREIL A LA TERRE.
0
10
120V ~ 60 Hz 225 Watts
Made in England by:
Marshall Amplification plc,
Bletchley, Milton Keynes, England.
VOS SOINS. FAITES TOUJOURS APPEL A UN TECHNICIEN QUALIFIE
POUR TOUTE REPARATION.
1
2
3
4
5
6
7
8
9
10
11
J CM6 0 0 He a d Re a r P a n e l
D.I.O UTPUT
WARNING!: SHOCK HAZARD. DO NOT OPEN. TO REDUCE THE RISK OF FIRE
OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
THIS APPARATUS MUST BE EARTHED.
CAUTION!: TO REDUCE THE RISK OF FIRE REPLACE FUSES WITH THE
SAME TYPE AND RATING ONLY. DISCONECT SUPPLY CORD BEFORE
CHANGING FUSE.TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT
REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING
TO QUALIFIED SERVICE PERSONNEL.
MAIN S FUSE
120V - T3A
230V - T1.6A
MAIN S IN PUT
Presence
PARALLEL
FX LO O P
SERIES
FX LO O P
60 watts RMS into 8/ 16
.
Pin
1
-
OV, Pin
2
-
High, Pin
3
-
Low
Emulated
O UTPUT
4
6
Return
Send
Return
Send
Main
16
Ext 16
Main 8
PWR Amp
Line Out
AVIS!: RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR. POUR EVITER LES
RISQUES D’INCENDIE ET DE DECHARGES ELECTRIQUES, N’EXPOSEZ JAMAIS CET
APPAREIL A L’HUMIDITE OU A LA PLUIE.
2
8
ATTENTION!: POUR EVITER LES RISQUES D’INCENDIE UTILISER UN
FUSIBLE DE MEME TYPE ET DE MEME CALIBRE. DEBRANCHER AVANT DE
REMPLACER LE FUSIBLE.POUR EVITER LES RISQUES DE DECHARGES
ELECTRIQUES, NE PAS OUVRIR LE COUVERCLE. CET APPAREIL NE
COMPORTE AUCUNE PIECE SUSCEPTIBLE D’ETRE REPAREE PAR
VOS SOINS. FAITES TOUJOURS APPEL A UN TECHNICIEN QUALIFIE
POUR TOUTE REPARATION.
CONNECTER CET APPAREIL A LA TERRE.
0
10
120V ~ 60 Hz 225 Watts
Made in England by:
Marshall Amplification plc,
Bletchley, Milton Keynes, England.
’
’
Refer to manual Se referer au manuel
1
2
3
4
5
6
7
8
9
10
11
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