Specification Chart - Marshall Amplification EL84 20/20 Manual

7. Channel B output impedance select
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
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
input signal to further power amp inputs.
13. Channel B input jack
amp.
14. Channel A input jack
amp.

Specification Chart

Parameter EL34 50/50
Size 19" 3U x 331mm deep
Weight 29.5 kg
Power input 350 watts
Voltage Input 115V or 230V
Frequency 50 or 60 Hz
Mains fuses T3.15A/115V
T1.6A/230V
H.T. Fuses T315 mA
Output Power 50W RMS
Output Impedance 8 or 16 Ohm*
Input sensitivity OdB
Input impedance 20KΩ
Output valve 2 x EL34
Phase inverter 1 x ECC81/12 AT7
Pre Driver 1 x ECC83/12 AX7
16 Ohm or
(See 6 for notes).
Connects channel B
Accepts input from pre-
Accepts input from pre-
EL34 100/100
19" 3U x 331mm deep
34.5 kg
700 watts
115V or 230V
50 or 60 Hz
T4A/115V
T2A/230V
T1A
100W RMS
8 or 16 Ohm*
OdB
20KΩ
4 x EL34
1 x ECC81/12 AT7
1 x ECC83/12 AX7
Note!
Using 14 only connects input signal to both
channels A & B for parallel mono operation.
15. Channel A link out jack
input signal to further power amp inputs.
Valve Location Guide
Rear Mounting Fixing Hole
Not Fitted To EL34 50/50
OUTPUT
TRANSFORMER
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EL34 EL34
MAINS
TRANSFORMER
ECC81 ECC83
12AT7 12AX7
FRONT
Notes
The unit must be supported at
the rear when mounted in a rack
Consult amp rating plate or dealer
Consult amp rating plate or dealer
Per channel
Per channel
Per channel
At clipping (per channel)
Consult dealer for 4 Ohm
Per channel
Per channel
Per channel
6
Connects channel A
Rear Mounting Fixing Hole
OUTPUT
TRANSFORMER
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EL34 EL34
MAINS
TRANSFORMER
ECC83 ECC81
12AX7 12AT7