Crate Amplifiers RED VOODOO BV-120HR - Manual (Page 7)

BV-120HR
RED VOODOO All Tube Guitar Amplifier
A Word About Tubes:
To increase the life of the tubes, allow your amp to cool down before moving it. After about a year (or soon-
er if you're on tour or jammin' more frequently than most) you may notice the output of your amp just isn't as
"alive" as it used to be. If the sound from your amplifier starts to grow weak, lacks punch, fades up and down,
loses highs and lows, gets "funny" (clanking sounds, etc.), it's possible that the power tubes are wearing down
and may need replacing. Since power tubes work together in an amplifier, it is important that they all be
replaced at the same time with a matched set.
If the amp starts to squeal, gets noisy, loses gain or starts to hum, the preamp tubes may be bad. Insist
upon using only the highest quality, low-microphonic tubes!
NOTE: Tube replacement should always be done by a qualified service technician, since adjustment
of the internal biasing controls will be necessary after the new tubes are installed. Also, removal of the
tubes may expose extremely hazardous voltage levels, which could cause injury or death.
To help prolong the life of your tube amplifier, and to keep it in top performing condition, please observe
the following guidelines:
• Always match the impedance of your speaker cabinet(s) to the amplifier’s impedance selector switch
setting.
• In cold weather, allow the amplifier to warm up to room temperature before turning it on.
• After using the amplifier, allow it to cool down before moving it.
• Protect the amplifier from exposure to dust and moisture. If liquid gets spilled into the amplifier, or if it
gets dropped or excessively jarred, have it checked out at a service center before using it.
System Block Diagram:
7
INPUT
MID LOW
CH.1
CH.2
HIGH VOLUME
REVERB
LEVEL 1
REVERB
LEVEL 2
PRESENCE
SEND RETURN
EFFECTS
LOOP
TUBE
STAGE
TUBE
STAGE
TUBE
STAGE
TUBE
STAGE
TUBE
STAGE
TUBE
STAGE
CHANNEL
SWITCHING
PAD
SWITCHING
EFFECTS
SWITCHING
FREQUENCY
COMPENSATOR
POWER
AMP
IMPEDANCE
SELECTOR
EXT.
SPKR
OUT
LOW
GAIN
VOLUME MID HIGH
MAIN
SPKR
OUT
LINE
OUT