High Gain Input; Low Gain Input; Rear Panel; Mains Input - Rivera KNUCKLE HEAD 2 Owner's Manual

POWER STANDBY
®
HANDCRAFTED BY
RIVERA RESEARCH & DEVELOPMENT SYLMAR, CA USA
nels; Gain 1's pull switch must be pushed in for the FS-7 to choose channels. See info on the FS-7 and
its functions.)

Low Gain input

This is a low-sensitivity input. Guitars plugged into it have
more headroom before distortion sets in (meaning that you can crank up a chan-
nel's volume a little louder before you experience preamp distortion). This is a
good choice for a clean overall sound, and is especially well-suited to active pick-
ups or guitars equipped with preamps.

High Gain input

This is a high-sensitivity input. If your guitar has hot pickups, then plugging into
it makes it easy to overdrive the preamp section, creating harmonic distortion. Guitars equipped with
low-output pickups seem hotter than usual when plugged into this input.

Mains Input

Your KnuckleHead II 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
RIVERA RESEARCH & DEVELOPMENT CORP., SYLMAR, CALIFORNIA, USA
AVIS: RIRQUE DE CHOC ELECTRIQUE NE PAS OUVRIR
MODEL
KNUCKLEHEAD II
SERIAL NUMBER
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)
CLEAN/RHYTHM
PRESENCE FOCUS MASTER 2 BASS
PULL
NINJA
R P
E A R
1A 250V 4A 250V
SLO-BLO SLO-BLO
CAUTION
FUSE FUSE
TO REDUCE THE RISK OF ELECTRIC
SHOCK, DO NOT REMOVE CHASSIS.
!
H.T. MAINS
FUSE FUSE
REPLACE FUSE WITH SAME TYPE AND RATING.
UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE.
MIDDLE TREBLE GAIN 2 MASTER 1 TREBLE
PULL PULL PULL
NOTCH BRIGHT BOOST SWEET
A N E L
115V 60Hz
INPUT POWER
MAINS INPUT 440 WATTS
LEAD/CRUNCH
MIDDLE BASS GAIN 1 INPUTS
LOW
PULL PULL PULL PULL
SCOOP BOOST SELECT
GAIN
LOW HIGH
GAIN GAIN
in addition to the nor-
mal line and neutral
pin. The power cord
supplied with your
KnuckleHead II has a
3-pin plug. Do not cut
off or damage the
ground pin. If the
HIGH
GAIN