R
E A R
P
A N E L
Mains Input
Your Hundred Duo Twelve has a detachable power cord that connects to the chassis AC connector labeled Mains
Input. Always use this cord and, in the event that the power cord requires replacement, replace it with the same type
of power cord. Consult your RIVERA dealer for further information. Be sure to use a grounded electrical mains
power supply socket whenever possible. These outlets have a grounding pin in addition to the normal line and neu-
tral pin. The power cord supplied with your Hundred Duo Twelve has a 3-pin plug. Do not cut off or damage the
ground pin. If the available electrical outlet is of the older 2-pin type, use a suitable ground-lift adapter.
The U.S.A., Canada, and Japan share a common CSA/UL-style cord. Most of Europe and Scandinavia utilize
a Euro plug and have a SEMKO/VDE-style cord. Australia uses a different type of plug, as does England.
Note: Avoid using long extension cords. Long cords have sufficient resistance to electrical current that the
voltage arriving at your amp can be significantly reduced. This can have a bad effect on your tone.
Mains Fuse
This AC line fuse protects your amplifier from damage due to shorts, momentary surges, and defective power
tubes. In the event of a fuse failure, always replace it with the same type of fuse.
Note: Always turn the amp off and wait about five minutes before replacing a fuse. This allows
the parts to cool and high voltages to dissipate.
For 100VAC versions, the Mains Fuse is: 5 Amp, 250 Volt Slo-Blo type (size 3AG, or MDL)
For 115VAC versions, the Mains Fuse is: 4 Amp, 250 Volt Slo-Blo type (size 3AG, or MDL)
For 230VAC versions, the Mains Fuse is: T 2A (time-delay, 5mm x 20mm size)
HT Fuse
The power amplifier circuit has its own fuse for protecting the output section from short circuits and tran-
sient current peaks that exceed the normal current draw. These conditions are usually caused by a bad tube.
When a short circuit or transient peak causes the fuse to blow, the output tubes should be checked and
replaced, if necessary.
For 100VAC and 115VAC versions, the HT Fuse is: 1 Amp, 250 Volt Slo-Blo type (3AG, or MDL)
For 230VAC versions, the HT Fuse is: T 1A (time-delay, 5mm x 20mm size)
Repeated blowing of this fuse is a clear indicator of a defective output tube.
Always use the correct fuse value when replacing the HT Fuse.
If the Mains Fuse or the HT Fuse repeatedly blows, refer your amp to your local RIVERA dealer or contact us
at (818) 890-2826 for further service assistance.
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8
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6
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
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MAINS
FUSE
CAUTION
TO REDUCE THE RISK OF
ELECTRIC SHOCK,
DO NOT REMOVE CHASSIS.
REPLACE FUSE WITH SAME TYPE AND RATING.
UTILISER UN FUSIBLE DE RECHANGE
DE MEME TYPE.
H.T.
FUSE
4A 250V
SLO-BLO
1A 250V
SLO-BLO
115V
60Hz
INPUT POWER
440 WATTS
MAINS INPUT
SERIAL NUMBER
MODEL
HUNDRED DUO TWELVE
WARNING: TO REDUCE THE RISK OF FIRE
OR ELECTRIC SHOCK, DO NOT EXPOSE
THIS EQUIPMENT TO RAIN OR MOISTURE.
RIVERA RESEARCH & DEVELOPMENT SUN VALLEY, CALIFORNIA, USA
FUSE
FUSE
