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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 pre-
amp.
14. Channel A input jack
Accepts input from pre-
amp.
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
ENGLISH
6
Rear Mounting Fixing Hole
FRONT
OUTPUT
TRANSFORMER
OUTPUT
TRANSFORMER
EL34
EL34
EL34 EL34
EL34EL34EL34EL34
Rear Mounting Fixing Hole
ECC81
12AT7
ECC83
12AX7
ECC83
12AX7
ECC81
12AT7
Not Fitted To EL34 50/50
MAINS
TRANSFORMER
MAINS
TRANSFORMER
Parameter EL34 50/50 EL34 100/100 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 20K 20K
Output valve 2 x EL34 4 x EL34 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
Specification Chart
6


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