Marshall Amplification Stereo System 1987X PW User Manual

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2
3
4
5
6
parallel giving an overall impedance of 8 Ohms;  
4. MAINS INPUT  
Technical Specification  
Power Output - 50W RMS  
Size - 740mm x 610mm x 265mm  
Weight - 30.2 kg  
1. LOUDSPEAKER OUTPUTS  
WARNING! Never use the amplifier without a load  
attached!  
therefore the output selector should be set to 8 Ohms.  
Your amp is provided with a detachable mains (power)  
lead, which is connected here. The specific mains input  
voltage rating that your amplifier has been built for is  
indicated on the back panel. Before connecting for the  
first time, please ensure that your amplifier is compatible  
with your electricity supply. If you have any doubt, please  
get advice from a qualified technician. Your Marshall  
dealer will help you in this respect.  
If an additional 8 Ohm extension speaker cabinet is used  
in conjunction with the internal speakers the output  
selector should be set to 4 Ohms.  
There are two parallel loudspeaker output jacks  
provided for connection to the internal speakers or  
extension cabinet. Please always ensure that the  
amplifier's output impedance selector is set correctly  
(see item 2) and ALWAYS ensure you use good quality  
speaker (unshielded) cables. NEVER use guitar (shielded)  
cables.  
Note: No additional extension speaker cabinet with  
impedance lower than 8 Ohms should be used in  
conjunction with the internal speakers.  
Failure to comply with any of the points raised in this  
section will result in damage to the amplifier.  
5. MAINS FUSE  
The correct value of mains fuse is specified on the  
rear panel of the amplifier. NEVER attempt to  
bypass the fuse or fit one of the incorrect value.  
Always use a non-screened Marshall approved speaker  
lead when connecting an extension cabinet to these  
units.  
3. MAINS SELECTOR  
Matches the amplifier’s mains transformer to the  
incoming mains voltage.  
6. H.T. FUSE  
2. OUTPUT IMPEDANCE SELECTOR  
Matches the amplifier’s output to the load (speaker)  
impedance.  
The correct value of this H.T. fuse is specified on  
the rear panel of the amplifier. NEVER attempt to  
bypass the fuse or fit one of the incorrect value.  
Your 1987X-PW should always be completely powered  
down before the mains selector is turned.  
Your 1987X-PW should be completely powered down  
before the Output Impedance Selector is turned.  
WARNING! ALWAYS ensure that this rotary selector  
is set to the correct mains voltage applicable for the  
country where the 1987X-PW is being used. If you do  
not know, consult your authorized Marshall dealer.  
Note: This equipment has been tested and  
found to comply with the requirements of the  
EMC directive (Environments E1, E2 and E3 EN  
55103-1/2) and the LowVoltage directive in the E.U.  
As is the case with any Marshall all-valve amplifier it is  
imperative that: a) the amplifier is connected to a load  
whilst in operation and b) the impedance selected on  
the amplifier matches the total impedance of the  
extension speaker cabinet(s) being used. The two  
internal speakers are 16 Ohms each.These are wired in  
Adjusting the selector from 230V to 120/100V or vice-  
versa will require the mains fuse (item 5) to be changed  
to the correct value as detailed on the rear panel.  
EUROPE ONLY - Note: The Peak Inrush  
current for the 1987X-PW is 26 amps.  
With every 1987X-PW sold Marshall will make a sizable donation to the Childline charity. Providing help  
and support to those children who need it, Childline is a vital service and one that relies heavily on private  
donations to operate. It is with great pleasure that both Marshall and Paul Weller, through the creation of  
the 1987X-PW, have agreed to support a charity that has such a positive effect on those who turn to it.  
Registered Charity Numbers:  
216401 & SC037717  
Marshall Amplification plc  
Denbigh Road, Bletchley, Milton Keynes, MK1 1DQ, England.  
Tel : +44 (0)1908 375411 Fax : +44 (0)1908 376118  
Whilst the information contained herein is correct at the time of publication, due to our policy of constant improvement  
and development, Marshall Amplification plc reserve the right to alter specifications without prior notice.  
BOOK-00092-00 / 12 / 08  
 

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