T
A B L E O F
C
O N T E N T S
Packing information
2
Safety precautions
2
Warranty
4
Quick Start instructions
5
Front panel
6
High Gain input
6
Low Gain input
6
Channel 1 overview and controls
6
Channel 2 overview and controls
7
Reverb
7
Presence
7
Standby
7
Power
7
Rear Panel
8
Mains Input
8
Mains Fuse
8
HT Fuse
8
Speaker outputs
9
Line Out
9
Footswitch jack
9
Effects Loop
10
Setting Effects Loop levels
10
Speakers
10
Connecting the Hundred Duo Twelve with other gear
11
Driving an extension speaker cabinet
11
Driving two speaker cabinets
12
Running two amps in parallel without a Y-cord
12
Slaving a second Hundred Duo Twelve
13
Slaving a second amp or power amp
13
Placing a signal processor in the effects loop
14
Sending a direct signal to P.A. or recording gear
14
Care and troubleshooting
15
Quick troubleshooting guide
16
Tube care and replacement
17
Tube location chart
17
Tube function explanation
17
Checking for microphonic tubes
17
Preamp tube first aid
18
Power amp tube first aid
18
Specifications
19
Channel 2
Channel 1
Hundred
Duo Twelve
PULL
SELECT
PULL
BOOST
STANDBY
POWER
LOW
GAIN
HIGH
GAIN
VOLUME
BASS
MIDDLE
TREBLE
MASTER
VOLUME
TREBLE
MIDDLE
BASS
MASTER
REVERB
PRESENCE
HANDCRAFTED BY RIVERA RESEARCH & DEVELOPMENT
SUN VALLEY, CA USA
INPUTS
PULL
BRIGHT
PULL
NOTCH
PULL
NINJA
10
9
8
76
5
4
3
2 1
10
9
8
76
5
4
3
2 1
10
9
8
76
5
4
3
2 1
10
9
8
76
5
4
3
2 1
10
9
8
76
5
4
3
2 1
10
9
8
76
5
4
3
2 1
10
9
8
76
5
4
3
2 1
10
9
8
76
5
4
3
2 1
10
9
8
76
5
4
3
2 1
10
9
8
76
5
4
3
2 1
10
9
8
76
5
4
3
2 1
10
9
8
76
5
4
3
2 1
5
4
3
2
