Marshall Amplification 9100 Bedienungsanleitung
Valve Power
Amps
9100 & 9200
Handbook
1
Marshall Amplification plc
Denbigh Road, Bletchley, Milton Keynes, MK1 1DQ, England
Tel: (01908) 375411
Fax: (01908) 376118
Web Site - http://www.marshallamps.com
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.
Jan ‘99
WARNING!
PLEASE READ THE FOLLOWING LIST CAREFULLY
A. ALWAYS fit a good quality mains plug conforming to the latest B.S.I. standards (UK only).
B. ALWAYS wire the plug in accordance with the colour code attached to the mains lead (UK only).
C. DO NOT attempt to remove the amplifier chassis. There are no user serviceable parts inside.
D. ALWAYS have this equipment serviced or repaired by competent, qualified personnel.
E. NEVER under any circumstances, operate the amplifier without an earth.
F. NEVER use any amplifier in damp or wet conditions.
G. ALWAYS ensure that the impedance of the speaker or speakers connected does not fall below the
amplifiers minimum impedance rating and is matched to this amplifiers output
I. PLEASE READ this instruction manual carefully before switching on.
Introduction
Models 9100 2 x 50 watt and 9200 2 x 100 watt stereo valve power amplifiers are the latest step forward in
valve rack technology from Marshall.
Built as dedicated guitar system based units, they incorporate many features that are both revolutionary
and evolutionary. From stunning styling through to the radical circuit design, these power amps are in a sonic
class of their own without any compromises to their true Marshall heritage.
The specially designed Marshall "Gold" front panel provides a deep recess in which the controls are sited
giving a smooth uncluttered finish whilst allowing the controls to be set and forgotten about, with little fear of
accidental re-adjustment. The removable top half contains a window, which in addition to showing the true
glory of the valves when the amp is in use, provides easy access to the output valves when replacement
becomes necessary.
The two power amp halves of your 9100/9200 are totally separate “MonoBlocs”, a feature that is normally
only found on expensive valve hi-fi power amps. This means that the only common electrical item (apart
from when specifically cross linking inputs) is the mains supply and that nothing that occurs to one power
amp can sonically react with the other half. Also in the unlikely event of one side breaking down, the other
side will carry on working regardless.
Our constant research into valve amplifier technology has resulted in further circuit design improvements
which dramatically effect the overall feel and playing response of the 9100 & 9200.
These improvements include Marshalls latest True Differential Inverter technology, which expands the
capability of the phase splitter (inverter) to be nearer to a true differential amplifier than most other circuits
used today. Put simply, the phase splitter takes the incoming signal and inverts half of it. This inverted half of
the signal forms the bottom half of the sound envelope and the non-inverted half forms the top half. The
effect of T.D.I. technology is to give a more defined spectrum of sound over a broader band width without
compromising the overdrive and compression effects for which valve amplifiers are famed.
This also allows more radical uses of feedback networks and the incorporation of the “voicing” switching
found on each channel. These incredible “voicing” options, which can be remotely activated, can be used to
greatly expand your pre-amps tone forming at the flick of a switch.
Mounting the 9100 and 9200 in a rack
Your 9100/9200 is a 19 inch 3U high rack mounting unit and subsequently we strongly recommend that, to
protect your investment, it is securely mounted in a suitable rack enclosure. A series of mounting holes are
provided both front and rear to allow sufficient fixings to be utilised. As with all rack mount products of
substantial weight, the rear of the unit must be supported as well as the front, therefore suitable brackets
should be obtained and fitted between the provided rear mountings and the rack case.
Ventilation and air flow
Even though the amplifier has fan reinforced cooling, it must be remembered that a valve amplifier, by
necessity, generates a high level of heat, and therefore should not be mounted or used in a situation without
adequate airflow.
2
9100 and 9200 valve power
amplifiers
1. Channel A mains power rocker switch
Connects channel A to incoming mains supply.
LED 3 indicates red when activated.
2. Channel A standby switch
Connects channel A's high voltage circuit to the
power supply. LED 4 indicates green when
activated.
Note! Items 1 & 2 are marked 0 &1 (to comply
with international regulations), 0 is off and 1 is on.
Note! To conserve valve life, standby switch 2
should remain off for at least 1 minute after
powering up the amplifier.
3/4. Mains & standby LED's.
5. Voice B LED -
Indicates red when channel A's voicing option B is
activated.
6. Channel A voice toggle switch
Selects voice option A or B, this function is
repeated on a remote switching jack on the rear
panel (see rear panel functions). The switch should
be in the B position for the remote switch to be
operative.
7. Channel A presence control
Rotary control to boost the upper mid to high
frequency content of sound.
8. Channel A gain control
Rotary control to set and balance the incoming
signal level.
9. Channel B gain control
10. Channel B presence control
11. Channel B voice switch
12. Channel B voice LED
13. Channel B standby LED
14. Channel B mains LED
15. Channel B standby switch
16. Channel B mains switch
Note! Channel A's notes also apply.
17. Upper front panel fixing screws
Use 2mm (5/64) allen head driver to remove.
18. Front rack mount fixing holes.
Rear Panel
1. Mains input socket
Connects amplifier to incoming mains supply.
3
AB
9200
Dual MonoBloc Amplifier
1 2 3 4 5 6 7 8 9 10 11 12 1314 15 16 17 18
1 23 45 6 7 8 9 101112131415
4
Specification Chart
Parameter 9100 9200 Notes
Size 19" 3U x 331mm deep 19" 3U x 331mm deep
the unit must be supported at
the rear when mounted in a rack
Weight 29.5 kg 34.5 kg
Power input 350 watts 700 watts
Voltage Input 115V or 230V 115V or 230V Consult amp rating plate
or dealer
Frequency 50 or 60 Hz 50 or 60 Hz Consult amp rating plate
or dealer
Mains fuses T3.15A/115V T4A/115V Per channel
T1.6A/230V T2A/230V Per channel
H.T. Fuses T315 mA T1A Per channel
Output Power 50W RMS 100W RMS At clipping (per channel)
Output Impedance 8 or 16 Ohm 8 or 16 Ohm Consult dealer for 4 Ohm
Input sensitivity OdB OdB
Input impedance 20KΩ20KΩ
Output valve 2 x 5881* 4 x 5881* Per channel
Phase inverter 1 x ECC81/12 AT7 1 x ECC81/12 AT7 Per channel
Pre Driver 1 x ECC83/12 AX7 1 x ECC83/12 AX7 Per channel
* Output valves may be either 5881 or EL34 please note they are not interchangeable. Consult qualified service personnel.
2. Channel B mains fuse
Please see specifications for correct ratings.
3. Channel A mains fuse
Please see specifications for correct ratings.
4. Channel B H.T. fuse
Please see specifications for correct ratings.
5. Channel A H.T. fuse
Please see specifications for correct ratings.
6. Channel B loudspeaker jacks
Connects channel B to loudspeaker load - model
9100 - 50 watts RMS, model 9200 - 100 watts
RMS.
7. Channel B output impedance select
16 Ohm or 8 Ohm - it is important that your
amplifier and loudspeaker load are correctly
matched.
Note! If 4 Ohm output is desired please consult
your authorised Marshall agent.
8. Channel A output impedance select
See 7 for notes.
9. Channel A loudspeaker jacks
See 6 for notes.
10,11. Remote voicing switching jacks
10 operates on channel B, 11 operates on channel
A. Short to ground function. Using jack 11 only
links channel A & B switching functions for
simultaneous use.
12. Channel B link out jack
Connects channel B input signal to further power
amp inputs.
13. Channel B input jack
Accepts input from preamp.
14. Channel A input jack
Accepts input from preamp
Note! Using 14 only connects input signal to both
channels A & B for parallel mono operation.
15. Channel A link out jack
Connects channel A input signal to further power
amp inputs.
Valve Location Guide
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Rear Mounting Fixing Hole
Not Fitted To 9100
FRONT
OUTPUT
TRANSFORMER OUTPUT
TRANSFORMER
MAINS
TRANSFORMER
MAINS
TRANSFORMER
5881* 5881* 5881* 5881*
5881*5881*5881*5881*
Rear Mounting Fixing Hole
ECC81
12AT7
ECC83
12AX7
ECC83
12AX7
ECC81
12AT7
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