Marshall Amplification JCM 900 valve series User Manual

Marshall Amplification plc,
Denbigh Road, Bletchley,
Milton Keynes, MK1 1DQ
England
TEL: (0908) 375411
FAX: (0908) 376118
Whilst the information contained herein is correct at
the time of publication; due to our constant
improvement and development, Marshall
Amplification plc reserve the right to alter
specifications without prior notice.
M0061/93/4/A
SL-X MASTER VOLUME
& DUAL REVERB
HANDBOOK
SL-X hbk 4/3/05 12:22 pm Page 8

Marshall Amplification JCM 900 valve series Specifications

General

Type	Valve (Tube) Amplifier
Power Output	50W or 100W
Channels	2
Preamp Tubes	3 x ECC83/12AX7
Effects Loop	Yes
Controls	Gain, Bass, Middle, Treble, Presence
Reverb	Yes
Footswitch	Yes, for channel switching

Summary

From the Chairman

Safety Warnings

Introduction to JCM 900 Series

Overview of Marshall's expertise in valve amplification and the distinct characteristics of the JCM 900 models.

HI GAIN MASTER VOLUME SL-X

HI GAIN DUAL REVERB

Explains the versatile, dual-channel design and tonal options of the Dual Reverb models.

VALVE OUTPUT POWER

Discusses the use of 5881 output valves and achieving optimal sound by balancing pre-amp and power amp levels.

SL-X Front Panel Controls (Items 1-3)

Details the initial front panel controls for SL-X models: Input Jack, Pre-Amp Volume, and Gain Sensitivity.

SL-X Front Panel Controls (Items 4-13)

HI GAIN DUAL REVERB Front Panel Controls

Details the front panel functions and controls for the HI GAIN DUAL REVERB models.

REAR PANEL FUNCTIONS - 50 Watt Models

REAR PANEL FUNCTIONS - 100 Watt Models

Details the rear panel functions specific to 100 Watt JCM 900 models, including valve failure indicators.