Marshall JVM410HJS [7/10] Rear panel operation
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Marshall JVM410HJS [7/10] Rear panel operation

Marshall JVM410HJS [7/10] Rear panel operation
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Switch the amplifi er off (power switch off, not standby
switch).
Press and hold the CLEAN MODE switch.
Switch the amplifer on while holding down the CLEAN
MODE switch (power switch on, not standby switch).
The 4 channel LEDs will glow orange.
Release the CLEAN MODE switch.
To confi rm the factory reset press the CRUNCH MODE
switch.
If you want to abort, press any other mode switch.
20. MAINS INPUT & FUSE
Your amp is provided with a detachable mains (power) lead,
which is connected here. The specifi c mains input voltage
rating that your amplifi er has been built for is indicated on
the back panel.
REAR PANEL OPERATION
14. SPEAKER OUTPUTS
There are 5 speaker outputs available on the rear panel.
They are labelled according to the intended impedances:
16Ω: connect any 16 ohms guitar cabinet to this jack.
8Ω: connect a single 8 ohms guitar cabinet or two 16 ohms
guitar cabinets.
4Ω: connect a single 4 ohms guitar cabinet or two 8 ohms
guitar cabinets.
WARNING, although the JVM amplifi er has 5 speaker
outputs never attempt to connect more speakers than
rated. The safe combinations are 1x16 Ohm, 1x8 Ohm,
1x4 Ohm, 2x16 Ohm or 2x8 Ohm. Any other speaker
confi guration may stress the power amplifi er section and in
extreme cases may lead to valve and/or output transformer
failure.
15. PROGRAMMABLE SERIAL FX LOOP
The JVM is equipped with a Programmable Serial FX loop.
Connect your external FX gear input to the JVM SEND jack,
and the FX output to the JVM RETURN jack. As described
previously, this effects loop can be bypassed from the front
panel and the amount of effect can be dialed in with the
RETURN LEVEL control.
The programmable serial FX loop features a return level
control. It allows the user to balance the returning signal
level from the effect either attenuating it or boosting it up
to +6dB.
In a usual setup the return level would be set to allow
engaging effects without a volume variation using the
Return Level control to compensate eventual volume
variations.
On the other hand it can also be used to completely mute
the amplifi er or as an extra solo/volume boost.
16. POWER AMP INSERT
This is a passive loop connected right before the master
controls. It is a line level loop so it is recommended to only
use high headroom devices to avoid signal degradation.
Plugging only into the return jack allows the use of the
JVM’s power section overriding the preamp.
Master controls and the emulated line out are located after
the serial loop so it is still possible to take advantage of
those features when using an external preamplifi er. The
loop can be taken off the circuit by pressing the BYPASS
switch, but as opposed to the Series FX loop this switch
cannot be programmed.
17. EMULATED LINE OUT
The pre master volume signal, processed through a 4x12
speaker cabinet emulator and electronically balanced is
made available at this connector.
18. FOOTCONTROLLER
Connect the supplied footcontroller using any standard
1/4" jack mono lead. Using any other type of footcontroller
rather than the supplied will have no effect and will be
ignored by the amplifi er.
19. MIDI IN / THROUGH
Connect any external MIDI gear to the MIDI In DIN socket.
A copy of the signal in this connector will be available
on the MIDI thru socket to allow daisy chaining of MIDI
equipment. Note that the JVM only accepts incoming data
and it is not able to send any MIDI commands.
HINTS & TIPS
Factory Reset
This will erase all the MIDI presets and set MIDI reception
channel to #1. Please note that once the memory is erased
it cannot be recovered.
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ENGLISH

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