REVV Generator 100R MK3 Owner's Manual page 7

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Note: The reverb switch is also used to toggle the FX
Loop in and out of the signal path when held down for 2
seconds. This method is used to save the FX Loop state
to the "preset mode" of a bank on the foot controller, or
quick toggle from the front of the amp front panel.
CABINET LIGHTING
The cabinet lighting jack on the rear of the amplifier
is used to connect the amp to Revv speaker cabinets.
Because the Revv badge on our cabinets lights up, you
can illuminate the cab badge with this jack.
Simply use the 4 pin Din cable provided with all Revv
cabinets and connect the amplifier to the cab lighting
connector on the cabinet.
FOOT SWITCH CONNECTION
This connection both powers your footswitch & allows
it to control your Revv. Should the provided footswitch
cable fail, any 5 PIN DIN cable can be used.
Note: This cable sends important data between the
amplifier and the footswitch. If a lesser quality 5 PIN
DIN cable is used, incorrect or erratic behavior could
occur. A high quality cable is recommended, which can
be provided by Revv should you need a replacement.
MIDI CONNECTIONS
The MIDI IN connection is for external equipment
connections when your rig necessitates control of your
Revv with third-party gear.
The MIDI through jack allows for the connection of
additional MIDI devices in your signal chain in addition
to your Revv.
See MIDI Section of this manual for more details.
IMPEDANCE & SPEAKER JACKS
The amplifier must always be connected to a speaker
cabinet or load when it is powered up and set to
have the internal load disengaged. This amplifier can
be used with cabinets that provide a load of 4, 8 &
16 ohms. Because the amplifier provides a number
of speaker jacks with different impedance options, it
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can also power 2 cabinets directly from the amplifier.
The speaker jacks must be used correctly for the
impedance to be matched between your amp and the
cabinets being connected.
Most setups are simple, one speaker cabinet plugged
into the amp, select the amplifier speaker jack
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impedance to that marked on the cabinet & you're
ready to go! However, when it comes to adding another
cabinet to the amplifier, more care must be taken to
prevent damage. Most amplifiers will not utilize more
than 2 cabinets, yours is no different. A maximum of
2 speaker cabinets can be connected to the amplifier.
Some examples:
•
Two 8 ohm cabinets would be plugged into the two
4 ohm speaker jacks (one per 8 ohm cab) located
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on the back of the amplifier.
•
Two 16 ohm cabinets would be plugged into the
two 8 ohm speaker jacks (one per 16 ohm cab)
located on the back of the amplifier.
•
Two 4 ohm cabinets cannot be run in parallel with
this amplifier. This will cause damage.
Warning: Using more than one speaker impedance
at a time will result in damage to the amplifier. For
example, if 2 speaker cabinets are connected to the
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8 ohm speaker jacks on the back of the amplifier, the
remaining speaker jacks (4 ohm and 16 ohm) must not
be used or connected to any other cabinets.
Note: No damage will result when running the amplifier
set at a lower impedance (Ex: 4 ohms) into a cabinet
rated at a higher impedance (Ex: 8 Ohms). However the
opposite will cause damage to the output transformer
or other components & it is suggested that the amplifier
never be run into a lower load.
Note: Depending on the power tubes used, this amplifier
can supply 180 watts+ of power to the speakers at high
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volumes, so it is important to be sure your cabinet can
handle that kind of power, especially when running
KT88/6550 type tubes.
TUBES &
BIASING
POWER TUBES
Our high wattage amplifiers are designed around 6L6
tubes - but will accept the following tubes & gladly
display their tonal characteristics for you in your Revv.
KT88
This tube is punchy with a strong low end and great
clarity. The extra power out of this tube adds extra
headroom & is very tight & focused. Overall can be
described as "more" of the same sound, with a focused
attack.
EL34
The EL34 tubes are more aggressive than the KT88,
they add more harmonic content & have a bit more
sizzle on the highs. Can impart a slightly "British"
classic flavor.
6L6GC
Our standard, the 6L6GC tube is big, open & articulate.
Note: The tubes listed above are guaranteed to bias
correctly & sound good in the amplifier, but if you
are an experienced technician other tubes can be
experimented with as well. 6550, KT77, KT66, 5881 can
be equipped, with care.
POWER TUBE SOCKETS
This amp has been designed to allow mixing of power
tubes as each pair has its own bias adjustment. Tube
positions 1 & 3 are set up as one pair & are biased with
the bias adjustment trimmer in between them. Tube 1
and 3 are the pair of power tubes closer to the middle
of the amplifier. Tubes 2 & 4 are the second set that are
biased with the adjustment trimmer in between them.
This pair of power tubes are found closer to the rear
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of the amplifier. This allows you to mix different power
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tubes in the amp if you wish to experiment with new
sounds. i.e. a set of KT88 tubes can be used with a set
of EL34 tubes.
Note: While we designed the amplifier to be easy
to maintain, we advise that all tubes be set up by a
qualified service technician to prevent damage to the
amp from improper bias settings.
PREAMP TUBES
This amplifier uses 12AX7 (ECC83) preamp tubes in the
preamp of your amplifier. Preamp tubes do not need
to be biased & usually have a long life unlike power
tubes, but a preamp tube can become faulty at any
stage of its rated lifespan.
POWER TUBE BIAS
You will need a voltmeter or digital multimeter set to
the lowest DC voltage range. (Make sure you refer to
the meter's user manual).
Note: Use tubes that are matched! If 2 different tube
types are being used, make sure they are matched. If all
4 are the same type, make sure they are matched pairs
(don't mix them) although a matched quad is better.
To prepare:
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1. Remove the rear baffle cover from the rear of the
amplifier. If you are replacing tubes, do so now with
the power off & the amplifier unplugged from the
main power receptacle. Place the new tubes in the
correct socket positions.
2. Turn the trimmers down by turning the trim pot
with a small screwdriver in the counterclockwise
direction. You can access the trim pots through the
small holes in between the power tube pairs. If any
fuses had blown, make sure to replace them as well.
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