JCM800 2203 - Guitar amp MARSHALL - Free user manual and instructions

USER MANUAL JCM800 2203 MARSHALL

IMPEDANCE Your amp can be used with any one of three dierent mains electricity supply sengs: 110V, 220V or 230V. You should set the mains selector in accordance with your mains electricity supply. Also check the value and type of mains fuse ed. For each of the sengs above, the correct value and type of mains fuse is specied on the rear panel of your amp. Never aempt to bypass any fuse or t one of the incorrect value or type. The output impedance selector should be set to the total impedance of the speaker cabinet(s) (or load) being used. If you have any doubt regarding your mains electricity supply or the impedance of speaker cabinet(s), please seek help from a qualied engineer – your Marshall dealer can help you with this.

Warning: your amp must be switched o and

disconnected from the mains electricity supply before you:

• change the mains selector for a dierent seng; and/or

• check and/or change any fuse; and/or

• change the output impedance selector for a dierent seng. Failure to comply with any of the points above may damage your amp.

impedance of the combined load of the speaker cabinet(s) you will be using.

2. Connect one or two speaker cabinets to the

Warning: failure to do the above may damage your

amp. When connecng a speaker cabinet make sure that you use a proper speaker cable. Never use a screened (shielded) guitar cable for this purpose.

3. Ensure that both the power switch and

standby switch are set to the o posion.

4. Connect the supplied mains (power) lead into

the power inlet on the rear panel rst and then into an electricity outlet.

5. Ensure that any master, volume and/or output

level controls on the front panel are set to zero.

6. Plug your guitar into one of the inputs on the

7. Turn the power switch on and wait a couple

9. Turn the volume up to your preferred level

and you’re ready to play.

TRANSPORTING YOUR EQUIPMENT

Please ensure that your amp is switched o, unplugged from the mains electricity supply and all removable cables have been disconnected from your equipment before aempng to move it. Only move the amp on its own. Do not aempt to move it while it is stacked on top of a cabinet or other equipment.

WARNING! SAFETY INSTRUCTIONS

Please read this manual carefully before plugging in. Follow all instrucons and heed all warnings.

The JCM 800 series is arguably one of the most successful ranges in Marshall’s history. It is instantly recognisable with both full, rich cleans and driven, aggressive tones. It features a master volume, versale EQ sengs including presence control, and a preamp volume control. This reissue also features an added eects loop and DI out. Power 100W Valves 2 x ECC83, 1 x ECC83 (phase splier) and 4 x EL34 Channels Single channel with 2 separate inputs Equalisaon Treble, middle, bass and presence Outputs 2 x 1/4” jack speaker outputs, selectable 16Ω / 8Ω / 4Ω load Eects Serial, switchable send/ return Unit weight 20.5kg Unit width 740mm Unit height 350mm Unit depth 210mm SPECIFICATIONENGLISH

Turns the amp on and o.

The standby switch is used in conjuncon with the power switch to ‘warm up’ the amp before use. Always turn the power on for two minutes before switching the standby switch to the ‘1’ posion. The standby switch should be set to the ‘0’ posion during breaks in performances instead of leaving the amp on full power.

Adjusts the high frequencies of the power amp. Increasing the high frequencies adds more bite to your sound.

Adjusts the low frequencies of the amp. It will add boom end and depth to your sound.

Adjusts the mid frequencies of the amp, giving you anything from scooped mids to a fat and full sound.

Adjust the upper frequencies of the amp. Your tone will get brighter as it is turned up.

This controls the input gain level of the preamp. This allows you to overdrive the amp to create distoron.

High sensivity guitar input socket. This input gives higher gain response (less headroom, more distoron).

Low sensivity guitar input socket. This input gives lower gain response (more headroom, less distoron). Note: you may want to choose which input channel you use to complement the output signal of your guitar. For example, high output (‘hoer’) guitars may benet from the extra headroom in the low input. Conversely, lower output guitars may benet from the extra gain in the high input channel. HIGH SENSITIVITY LOW

Choose between the two dierent loop levels to match the type of eect(s) connected to the eects loop. The higher level (+4dBu: switch ‘out’) suits rack processors and the lower level (-10dBV: switch ‘in’) suits oor pedals.

2. EFFECTS LOOP BYPASS

Engages/disengages the eects loop. The eects loop is engaged when the switch is pressed inwards.

3. EFFECTS LOOP RETURN

Returns signal from eects loop or outboard equipment.

4. EFFECTS LOOP SEND

Sends signal to eects loop/outboard equipment. 5 & 6. SPEAKER OUTPUTS Connect one or two speaker cabinets here using 1/4” jack speaker cables.

Warning: always ensure the output impedance

selector is set to the appropriate impedance for the load of your setup (speaker cabinets). Never use this amp without a speaker or load.

7. OUTPUT IMPEDANCE SELECTOR

Matches the amp’s output to the load impedance. Ensure the amp is completely powered down before turning the selector. The impedance selected on the amp must match the total impedance of the speaker cabinet(s) being used. Common setups include:

• If the amp is running into a single 16Ω cab, the selector should be set to 16Ω.

• If running into two 16Ω cabs, the selector should be set to 8Ω.

• If running into two 8Ω cabs, the selector should be set to 4Ω.

Warning: failure to comply with these points will

result in damage to the amp.

Matches the amp mains transformer voltage to the incoming mains voltage. The mains selector must be set to the voltage of the mains supply. Your amp should be completely powered down before the selector is turned. Note: adjustment from 230/220V to 110V or vice versa will require the mains fuse to be changed to the corresponding value as detailed on the rear panel.

The supplied mains power lead is connected here.

The correct value of mains fuse is specied on the rear panel.

The correct value of H.T. fuse is specied on the rear panel.

654321 8 9 10 11Whilst the informaon contained herein is correct at the me of publicaon, due to its policy of constant improvement and development, Marshall Amplicaon Plc reserves the right to alter specicaons without prior noce. MARSHALL AMPLIFICATION PLC, DENBIGH ROAD, BLETCHLEY, MILTON KEYNES, MK1 1DQ, ENGLAND. T: +44 (0) 1908 375411