Marshall 2555X Silver Jubilee Owner`s Manual

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marshallamps.com

Marshall Amplication plc, Denbigh Road,

Bletchley, Milton Keynes, MK1 1DQ, England.

Telephone: [phone] | Fax: [phone]

Registered in England. Registered Number: 805676

Whilst the information contained herein is correct at the time of publication, due to our policy of constant improvement

and development, Marshall Amplication plc reserves the right to alter specications without prior notice.

BOOK-00143-00

Introduction

The Silver Jubilee Series was created in 1987 to celebrate the 25th

anniversary of the founding of Marshall Amplication and 50 years of Jim

Marshall being in the music business. This Limited Edition series of all-

valve ampliers and speaker cabinets looked stunning in silver vinyl

covering, with the amps having chrome-plated control panels.

Based on JCM800 2203 and 2204 Master Volume models, the Silver
Jubilee ampliers were the rst Marshall products to feature a valve output

stage that could be switched from full power to half power. The series
had a somewhat unusual preamp circuit too, featuring three gain ‘modes’
which were ‘Clean’, Rhythm Clip (Boost), and Lead Channel. ‘Clean’ to
Rhythm Clip was controlled by a pull switch, as was the footswitchable
channel change. The Bass, Middle, Treble & Presence controls, although
shared between channels, were re-designed and offered more tonal
variation than any other Marshall product had before.

The Silver Jubilee 2555 head caused a sensation when it was launched in
January 1987 and has since become a collector’s piece. But the real
reason the 2555 acquired legendary status is because of the playing

public, who took it to their hearts. As a result, since it was discontinued in
1988, one of the most common questions we have been asked is, “when

are you going to re-issue the Silver Jubilee 2555?” So, by popular
demand, we have created the 2555X, which is a modern re-issue of the
2555 head, with exactly the same sonic characteristics and functionality.

“Thanks are due to you and the veritable army of musicians
who by their appreciation of, and skill in using Marshall

Ampliers over the years, have helped us to create this

memorable Jubilee Series.”

- Jim Marshall, 1987.

Front panel functions

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1. Input Jack

Plug in here to connect your guitar to the amplier.

2. Input Gain Control/Rhythm Clip

The Input Gain control adjusts the overall sensitivity of the input circuit. It
controls the gain level of the clean/crunch Rhythm mode. The pull switch
function activates the Rhythm Clip mode, providing heavier, more driven
tones. N.B. The apparent drop in volume when Rhythm Clip mode is
selected may be overcome by increasing the level of the Output Master
(No. 5).

3. Lead Master

When the Lead Channel is active (No. 5) the Lead Master adjusts the
output level of the Lead Channel.

4. Lead Channel L.E.D.

Indicates red when the Lead Channel is selected.

5. Output Master Control/Lead Channel

The Output Master controls the output of the preamp section to the power
stage. The Lead Channel is selected using the footswitch (supplied).
The channels can also be switched by using the push/pull function of the
Output Master control. The amount of gain applied to the Lead Channel
can be controlled using the Input Gain control (No. 2)

6. Treble Control

Adjusts the amount of upper frequencies in the sound.

The above is the late, great Jim Marshall quoted from the original Silver
Jubilee owner’s manual. The sentiment he expressed then is extended to

you now for choosing to purchase the 2555X – our thanks are indeed due

to you. We hope you enjoy your new 2555X.

- The Marshall Team

7. Middle Control

Adjusts mid-range frequencies in the sound. High settings will provide a
fatter sound by boosting the mids. Lower settings cut the mids, providing a
more ‘scooped’ sound, accentuating the Treble and Bass frequencies.

8. Bass Control

Adjusts the low frequency content of the sound.

9. Presence Control

This is a power amp function which adjusts the ‘brightness’ of the whole

amplier in conjunction with the Treble control.