Marshall 1987X Guitar Tube Amplifier User Guide
- June 6, 2024
- Marshall
Table of Contents
Marshall 1987X Guitar Tube Amplifier User Guide
1987X
WARNING! SAFETY INSTRUCTIONS
Please read this manual carefully before plugging in. Follow all instructions
and heed all
warnings.
Warning: please refer to full details in separate Important Safety Instructions leaflet (document number CATS-00158).
MAINS ELECTRICITY SUPPLY AND OUTPUT IMPEDANCE
Your amp can be used with any one of three different mains electricity supply settings: 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 fitted.
For each of the settings above, the correct value and type of mains fuse is specified on the rear panel of your amp. Never attempt to bypass any fuse or fit 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 qualified engineer – your Marshall dealer can help you with this.
Warning: your amp must be switched off and disconnected from the mains electricity supply before you:
- change the mains selector for a different setting; and/or
- check and/or change any fuse; and/or
- change the output selector for a different setting.
Failure to comply with any of the points above may damage your amp.
IMPORTANT SET UP INFORMATION
- Set the output impedance selector to the impedance of the combined load of the speaker cabinet(s) you will be using.
- Connect one or two speaker cabinets to the speak outputs. Warning: failure to do the above may damage your amp. When connecting a speaker cabinet make sure that you use a proper speaker cable. Never use a screened (shielded) guitar cable for this purpose.
- Ensure that both the power switch and standby switch are set to the off position.
- Connect the supplied mains (power) lead into the power inlet on the rear panel first and then into an electricity outlet.
- Ensure that any master, volume and/or output level controls on the front panel are set to zero.
- Plug your guitar into one of the inputs on the front panel.
- Turn the power switch on and wait a couple of minutes.
- Turn the standby switch on.
- Turn the volume up to your preferred level and you’re ready to play.
TRANSPORTING YOUR EQUIPMENT
Please ensure that your amp is switched off, unplugged from the mains electricity supply and all removable cables have been disconnected from your equipment before attempting to move it.
Only move the amp on its own. Do not attempt to move it while it is stacked on top of a cabinet or other equipment.
SPECIFICATION
This reissue has been lovingly crafted to replicate the tone and look of the original 1987. The 1987X features two channels to help you choose and blend classic Marshall grit and warm cleans, with the benefit of an added effects loop. At 50W it breaks up earlier than it’s bigger brothers but still has enough power to fill any venue.
FRONT PANEL FUNCTIONS
1. POWER SWITCH
Turns the amp on and off.
2. STANDBY SWITCH
The standby switch is used in conjunction 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 ‘on’ position.
The standby switch should be set to the ‘off’ position during breaks in performances instead of leaving the amp on full power.
3. INDICATOR
The power indicator will light when the amp’s mains power is switched on.
4. PRESENCE
Adjusts the high frequencies of the power amp. Increasing the high frequencies adds more bite to your sound.
5. BASS
Adjusts the low frequencies of the amp. It will add bottom end and depth to your sound.
6. MIDDLE
Adjusts the mid frequencies of the amp. Giving you anything from scooped mids to a fat and full sound.
7. TREBLE
Adjusts the upper frequencies of the amp. Your tone will get brighter as it is turned up.
8. HIGH TREBLE – LOUDNESS 1
Controls the overall output level of channel 1. This channel is voiced for a higher treble response than channel 2.
9. NORMAL – LOUDNESS 2
Controls the overall output level of channel 2. Channel 2 is voiced for normal
response and has a more rounded tone than channel 1.
10. INPUTS.
1 (Top): Connects the guitar to channel 1.
1 (Bottom): Connects the guitar to the lower
sensitivity input on channel 1.
2 (Top): Connects the guitar to channel 2.
2 (Bottom): Connects the guitar to the lower sensitivity input on channel 2.
Note: some guitar players prefer to mix the two channels together by connecting a short, screened patch lead between the bottom input of channel 1 and the top input of channel 2. If you then plug your guitar into the top input of channel 1, you can mix the different tonal characteristics of each channel for greater flexibility.
REAR PANEL FUNCTIONS
1. EFFECTS LOOP LEVEL
Choose between the two different loop levels to match the type of effect(s) connected to the effects loop. The higher level (+4dBV: switch ‘out’) suits rack processors and the lower level (-10dBV: switch ‘in’) suits floor pedals.
2. EFFECTS LOOP BYPASS
Engages/disengages the effects loop. The effects loop is engaged when the switch is pressed inwards.
3. EFFECTS LOOP RETURN
Returns from effects loop or outboard equipment.
4. EFFECTS LOOP SEND
Sends to effects loop or 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 may damage the amp.
8. MAINS SELECTOR
Matches the amp’s 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.
Warning: for each voltage setting, the correct value and type of mains fuse and H.T fuse must be fitted. Adjustments from 230/220V to 110V or vice versa will require the mains fuse to be changed to the corresponding value as detailedon the rear panel. For more information, please refer to the Mains Electricity Supply and Output Impedance section of this guide.
9. POWER INLET
The supplied mains power lead is connected here.
10. MAINS FUSE
The correct value of the mains fuse is specified on the rear panel.
11. H.T. FUSE
The correct value of the H.T. fuse is specified on the rear panel.
Whilst the information contained herein is correct at the time of publication, due to its policy of constant improvement and development, Marshall Amplification Plc reserves the right to alter specifications without prior notice.
MARSHALL AMPLIFICATION PLC,
DENBIGH ROAD,
BLETCHLEY, MILTON KEYNES,
MK1 1DQ, ENGLAND.
T: +44 (0) 1908 375411
MARSHALL AMPLIFICATION PLC
REGISTERED IN ENGLAND
REGISTERED NUMBER: 805676
M3311.321 | CATS-00269-02-v01
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