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Rear Panel
(33) EFFECTS LOOP RETURN
1/4" input for returning signals from external low-level effects or signal processing equipment. This
is a switching jack. Inserting a plug into this jack will break the signal path until it is returned via the
EFFECTS SEND (#32) jack.
If the effects loop is used then it will automatically be on if a footswitch is not used. However, the effects
loop can by bypassed by using an optional remote dual latching footswitch.
(34) FOOTSWITCH JACKS
Provided for the connection of the optional remote dual latching footswitches.
One dual footswitch can be used to select the Lead or Clean CHANNEL: the switch connected to the 'ring'
of the jack (left on a Peavey footswitch), and to activate/defeat the GAIN or BOOST (#8 & #9): the switch
connected to the 'tip' of the jack (right on a Peavey footswitch),
Additionally another dual footswitch can be used to turn the EFFECTS LOOP on and off: the switch
connected to the 'ring' of the jack (left on a Peavey footswitch), and REVERB on and off: the switch
connected to the 'tip' of the jack (right on a Peavey footswitch),
Peavey footswitches are available with and without LEDs to indicate current settings. Please refer to
www.peavey.com or customer service for more information and product codes.
To footswitch CHANNEL, GAIN or BOOST the relevant front panel switches need to be set to their "IN"
position. The BOOST footswitch turns on and off either or both GAIN or BOOST functions, as selected by
the front panel switches. If no switch is depressed then the BOOST footswitch does not function.
In the case of the ValveKing
20MH, a certain amount of volume boost, as well as gain, is voiced into the
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circuit when GAIN (#8) is selected. This is also available as a slight volume boost on the Clean channel,
and can also be footswitched, further increasing the versatility, despite its compact design.
When using a footswitch, always insert the plug fully (second click) into the FOOTSWITCH jacks to
ensure proper operation.
(35) MICROPHONE SIMULATED USB AUDIO RECORD OUTPUT
The ValveKing
USB Record Output requires no additional drivers – just plug a standard USB 2.0 cable
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into your computer and it will detect it as an audio device. Open your favorite recording program and
start recording. The output is derived from the MSDI
so will sound great right into your computer.
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This can be used in any setting of the POWER OUTPUT (#25) or SPEAKER DEFEAT (#28) switches and
there should be little comparative difference in USB audio level. Therefore a good strong signal can still
be recorded while the amp is set to 5% power or even silent.
The actual level of the signal from the USB out will be dependent on the settings of the controls.
However, each unit has been calibrated so that a very wide range of sounds and levels will all fit within
the USB headroom. Like with any recording, especially digital, the actual recording levels should be set
so as to prevent any unwanted distortion.
Power tubes
As mentioned earlier, the ValveKing
100 and ValveKing
50 can use either 6L6GC or EL34 power tubes.
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The design and all the relevant components have been chosen/upgraded so they can handle both types.
The choice of which is often dependant on personal taste. Due to their slightly higher gain, EL34's will
likely produce about 10-15% more power.
WARNING!!! If the power tubes are changed then the amplifier MUST be re-biased. We have designed
them so this is a fairly quick and easy procedure, but this should be carried out by a qualified and
competent technician/engineer. This is not only due to safety, but also to ensure the user gets the best
sound and longevity from their new tubes. Incorrectly biased power tubes can either sound dirty and
lifeless or burn out unnecessarily quickly.
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