2245 (JTM45)
1012
2245 (JTM45) Front Panel2245 (JTM45) Rear Panel
MODEL: JTM45WARNING!:RISK OF HAZARDOUS ENERGY
!AVIS!:ENERGIE ELECTRIQUE DANGEREUSE!OUTPUTH.T. FUSEMAINS INPUTMAINS FUSE
MAINSSTANDBYPRESENCEBASSMIDDLETREBLEHIGH TREBLENORMALSPEAKERS
46464646464612
MK282828282828INPUTSJTMJTMMANUFACTURED BYMARSHALL AMPLIFICATION PLC
II4545BLETCHLEY, MILTON KEYNES, ENGLAND.
01001001001001001012
ONONLOUDNESS 1LOUDNESS 2117V ~ 60HzT1.6A 230VCONNECT SPEAKERS BEFORE USE
OUTPUT: 30 WATTS RMS
SELECTORT500 mA175 WattsT3.15A 117V
ENGLISH
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1. Power Switch7. Treble Control1/2. Loudspeaker Outputs4. H.T. Fuse
On / Off Switch for mains power to the amplifier.Controls the high frequencies of the guitar tone,These are for connection to an external load, i.e.The correct value of H.T. fuse is specified on the
making your guitar sound brighter when increased.speaker cabinet(s). (See item 3).rear panel of the amplifier. Please refer to Important
ENGLISHPlease ensure the amplifier is switched off and
Safety Instructions, page 2.
unplugged from the mains electricity supply before(Note: The tone network is highly interactive andPlease refer to Important Safety Instructions, page 2.
being moved.altering one control can change the shape of the
5. Mains Input
sound in relation to the other tone controls.3. Output Selector
Your amp is provided with a detachable mains
2. Standby SwitchExperimentation is the best way to achieve yourMatches the amplifierOs output to the load
(power) lead which is connected here. The specific
The Standby Switch is used in conjunction with thedesired sounds.)impedance.
mains input voltage rating that your amplifier has
Power Switch (item 1) to �warm upO the amplifier
With all-valve amplifiers it is imperative that the ampbeen built for is shown on the back panel. Before
before use and to prolong the life of the output8. High Treble Loudness 1
is connected to a load whilst in operation and that theconnecting for the first time, please ensure that your
valves.Controls the overall output level of Channel 1.
impedance selected on the amp matches the totalamplifier is compatible with your electricity supply. If
Note: This channel is voiced for a higher treble
When powering up the amplifier always engage theimpedance of the speaker cabinet(s) being used. Foryou have any doubt, please get advice from a
response than Channel 2.
Power Switch (item 1) first. This allows theexample, if the amp is running into a single 16 Ohmqualified person. Your Marshall dealer will help in this
application of the voltage required to heat the valvescab, the amp should accordingly be set to 16 Ohms.respect.
9. Normal Loudness 2
to their correct operating temperature. After about 2If running into two 16 Ohm cabs, the amp should be
Controls the overall output level of Channel 2.
minutes, when the valves are up to the correctset to 8 Ohms. If running into two 8 Ohm cabs, the6. Mains Fuse
Note: Channel 2 is voiced for normal response.
temperature, the Standby Switch can be engaged.amp should be set to 4 Ohms.The correct value of mains fuse is specified on the
Upon doing this the H.T. (High Tension) which is the10. Input JackFailure to comply with these points will result inrear panel of the amplifier. Please refer to Important
high voltage required by the output valves to passSafety Instructions, page 2.
Connects the guitar to Channel 1. damage to the amplifier.
signal (and hence produce sound) is applied.
Note: Though the first input of the first channel isYour amp should be completely powered down
To prolong valve life, the Standby Switch alonethe input that most guitarists use, donOt be afraid to
before the selector is turned.
should be used to turn the amplifier on and offexperiment. Some guitar players prefer to mix the
during breaks in a performance. Also, upon fulltwo channels together by connecting a short,
power down always disengage the Standby Switch
screened patch lead between the second input of
prior to the main Power Switch (item 1).Channel 1 and the first input of Channel 2. If you
then plug your guitar into the
3. Indicator
first input of Channel 1 (item 10),12
The Indicator will be lit when your amplifier is on
you can mix the different tonalINPUTS
and will not be lit when the amplifier is switched off.
characters of each channel for12
greater flexibility. (See diagram).
4. Presence Control
Adds higher frequencies to the guitar tone, creating
11. Input Jack
crispness and bite. Turning this up will make the
Connects the guitar to the lower sensitivity input on
sound more cutting and �presentO.
Channel 1.
5. Bass Control
12. Input Jack
Controls the amount of low frequencies or bottom
Connects the guitar to Channel 2.
end in your tone.
13. Input Jack
6. Middle Control
Connects the guitar to the lower sensitivity input on
Dictates the middle register of the amplifier.
Channel 2.
Turning this up will make your guitar sound fatter.
Conversely reducing the amount of middle in your
tone will result in a sharper and thinner guitar sound
for a more �scoopedO tone.
910 |
ACEC
