11
10
Master
13. Reverb
The Reverb control sets the overall level of the reverb effect. With the control fully
counter clockwise there will be no reverb. Turning the control clockwise will increase
the amount of reverb.
14. Volume
This controls the overall volume of your amplifier. Turning it clockwise increases the
volume.
15. Power Switch
This switch allows the reduction of the output stage from full power down to 10%
power. This means the full tonal depth of the valve power amplifier can be enjoyed at
lower volumes, therefore making the JJN-20RH MkII ideal for recording, smaller gigs
and home practise use. Working in conjunction with the power amplifier voltages,
this method of power reduction suffers none of the loss in tone of other power
reduction systems.
16. Power Indicator Light
The Power Indicator will light when the amplifier is switched on.
17. Power
This switch is used to turn the amplifier on and off.
NOTE:
There is no standby switch on these amplifiers. The valves will warm up as
normal and the amplifier will automatically switch to standby mode if either the Input
or Speaker Output jacks are not in use.
Rear Panel
1. Mains Fuse
The value of the Mains Fuse is specified on the rear panel. Never use a fuse of the
incorrect value or attempt to bypass it.
2. Mains Input
The supplied detachable mains lead is connected here. The lead should only be
connected to a power outlet that is compatible with the voltage, power and frequency
requirements stated on the rear panel. If in doubt get advice from a qualified technician.
3. H.T. Fuse
The value of the H.T. Fuse is specified on the rear panel. Never use a fuse of the
incorrect value or attempt to bypass it.
English
English
4. Speaker Outputs
The output marked ‘1x16 Ohm’ is for the connection of a single 16 Ohm extension
speaker cabinet.
The outputs marked ‘1x8 Ohm or 2x16 Ohm’ are for the connection of either a
single 8 Ohm extension cabinet or two 16 Ohm cabinets.
‘1x16 Ohm’ output
‘ 1x8 Ohm or 2x16 Ohm’ outputs
Internal 16 Ohm combo speaker
X X
Internal 16 Ohm combo speaker
X
plus one 16 Ohm extension cab
One 16 Ohm extension cabinet
X X
Two 16 Ohm extension cabinets
X
Single 8 Ohm extension cabinet
X
X
WARNING:
The output marked ‘1x16 Ohm’ should never be used at the same time
as any of the outputs marked ‘1x8 Ohm or 2x16 Ohm’. Failure to correctly match
the impedance of the amplifier and speakers will damage the amplifier.
5. Emulated Output Mono Balanced XLR Socket
This output emulates the tonal characteristics of a guitar speaker cabinet and
provides a natural valve overdrive tone for connection to a recording device or
mixing desk. Using a good quality screened lead, the balanced XLR connection
provides a high quality signal free of noise.
6. Emulated Output Stereo Jack Socket
This output emulates the tonal characteristics of a guitar speaker cabinet and provides
a natural valve overdrive tone for connection to a recording device or mixing desk.
Always use a good quality screened lead. The stereo jack socket accommodates
connection of headphones to this output, allowing you to practice silently.
7. Emulated Output Cabinet Switch
The switch enables you to select either a 4x12 closed back or a 1x12 open back
cabinet emulation for the Speaker Emulated Output. This will apply to both the
balanced XLR and stereo jack outputs.
Ring
Screen
Tip
Left channel
to mixer
Right channel
to mixer
