Ht Fuse; Speaker Outputs; Line Out - Rivera KNUCKLE HEAD 2 Owner's Manual

POWER STANDBY
®
HANDCRAFTED BY
RIVERA RESEARCH & DEVELOPMENT SYLMAR, CA USA

HT Fuse

The power amplifier circuit has its own fuse for protecting the output section from short circuits and
transient 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: T1A (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) 833-7066 for further service assistance.

Speaker outputs

A speaker must always be connected to your
KnuckleHead II. The amp is designed to deliver at
least 120 watts to a 4-ohm speaker load. If it has to
drive speaker loads lower than 2 ohms, its output
transformer or other components could be damaged.
You can use 8- or 16-ohm extension cabinets, either
alone or in pairs (one connected to each speaker out-
put).
Never use a 2-ohm speaker cabinet alone, or a pair of 4-ohm extension speaker cabinets together. The
only time you may run the amp without a speaker connected is if you have a proper "dummy" imped-
ance load box plugged into the speaker output. Using a dummy load protects the output transformer,
but prolonged use shortens the life of the amp's output tubes.
Always use a heavy-gauge speaker cord. A shielded guitar cord can't handle the power that
your amp provides, and therefore won't sound right—plus it may actually harm your amp.
Refer to the connection diagrams for further information.
Note: Never use a speaker output to connect directly to the input of a mixer, a tape recorder, a slave
amp, or headphones. For further information, refer to the hook-up diagrams for proper connection
with extension speaker cabinets.

Line Out

Your KnuckleHead II can drive another KnuckleHead II, power amp, or other guitar amplifier. The
Line Out is post-power amp, so every bit of tone from your preamp, effects (if used), and power-amp
circuitry is sent from this jack. Use a shielded cord connected between the KnuckleHead II's Line Out
and the input of a second amplifier (check that amp's manual—it may recommend a specific input).
The Line Out can also be used to feed a signal to a tape recorder or mixer. Although the recorder or mixer
doesn't receive the tone that comes from the speaker, it does receive all of the signal from every other stage of
the amp, and for live-performance recording, it does an excellent job of isolating your guitar sound.
CLEAN/RHYTHM
PRESENCE FOCUS MASTER 2 BASS
PULL
NINJA
MIDDLE TREBLE GAIN 2 MASTER 1 TREBLE
PULL PULL PULL
NOTCH BRIGHT BOOST SWEET
IMPEDANCE
SELECTOR
8
FOOTSWITCH
USE FS-7 ONLY
LEAD/CRUNCH
MIDDLE BASS GAIN 1 INPUTS
LOW
PULL PULL PULL PULL
SCOOP BOOST SELECT
GAIN
WARNING: TO REDUCE THE RISK OF FIRE RIVERA R
OR ELECTRIC SHOCK, DO NOT EXPOSE
AVIS: RIR
THIS EQUIPMENT TO RAIN OR MOISTURE
TOTAL MIN. z 4 Ω 120W. RMS
SPEAKER JACKS IN PARALLEL
LINE OUT SPEAKER 2 SPEAKER 1
560 Ω USE FIRST
HIGH
GAIN
KN
SE