Technical data

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What to do as standard when looking for the cause of a fault
Check if all cables (guitar, FX, and speaker cables) have been correctly
plugged in and are in full working order. Take out all FX devices and test
AMP1
™
first without any peripheral devices.
AMP1
™
won’t switch on
There is no power. Ensure you’ve connected the cable to the mains correctly.
AMP1
™
is correctly cabled up and switched on, but
I still don’t hear anything
•TheVOLUMEcontrolontheguitaristurneddown.
• AMP1
™
’s MASTER and/or VOLUME controls are turned down.
•Allsoundcontrolsaresetto0.
•TheFXpathisactivated,andissettoSERIAL,buttheconnected
FX device is not working.
The CLEAN Channel sounds overdriven
Turn the Boost off, and turn down control 24. Turn the CLEAN Volume
down to 3. From 5, standard guitar pickups will start to overdrive. Pow-
erful pickups can fully saturate when the Clean Channel is only at 3. So
don’t worry – if the Volume can’t be turned up much, this is deliberate!
The best clean amps don’t have a Master. For this reason, turn up the
Master! Now you can slowly turn up the CLEAN Volume up to the
point that the sound starts to go into overdrive. After that, you can also
reactivate the Boost and carefully turn up its control 24, until you get a
sound you like.
The footswitches don’t show my selected function
AMP1
™
is in Preset Mode 39 .
To return to Normal Mode, switch AMP1
™
on while holding down the
Channel button.
The amp is not reacting to external control com-
mands from the REMOTE1
™
foot controller
•Is REMOTE1
™
connected to the Remote port?
•Isthejackcableyou’reusinginfullworkingorder?
•WhentheswitchesontheRemotelightup,thereisaconnection.
When using FX units, the sound is undefined
and “muddy”
The FX unit provides a direct signal that is mixed with the original signal
in the parallel FX path. Depending on the FX you’re using, the phase
length of the direct signal when mixed in parallel with AMP1
™
can lead
to phase cancellation. This is particularly the case with digital FX devices,
because by changing from analogue into digital and back, latency natu-
rally occurs. This changes the phase length.
To prevent this from happening, you should turn down the direct signal
in the FX device. If that’s not possible, switch the FX path to SERIAL.
Humming noises. This topic is very complex, and
there are different causes!
•Theshieldingofthejackcableyouareusingisdamagedattheinputor
the effects path. Test this by exchanging the cable.
•Networkgroundingisnotworkingcorrectlyorismissingcompletely: 
exchange power cord, try a different power socket.
•Strongexternalmagneticeldsareaffectingthepickup,cableconnections
or even the amplifier. Check whether AMP1
™
and connected cables are
situated near power transformers and/or electric motors, and make sure to
keep a sufficient distance from these.
“Bright humming noises” / “whirring”
(These noises often occur on stage near dimmer packs)
•Changeelectricalcircuit.Keepasufcientdistance.Switchthelighting
system to full power and leave it there.
•Groundloop:isthereaconnection(forexampleviaashieldedcable) 
between AMP1
™
and other equipment, which is also connected to network
grounding via its own power plug?
If you do not have the skills or knowledge required, please con-
sult an authorised service workshop or a service professional.
How can I extend the lifespan of my AMP1
™
?
•Avoidextremeshaking
•Alwaysmakesureventilationslotsareuncovered,foranundisturbed
air circulation
•Neverexpose AMP1
™
to extreme heat or cold.
•Preventdustandmoisturefromenteringthedevice.
•Neverconnectdeviceswithexcessivelyhighoutputlevelsto
AMP1
™
’s input ports.
•No“doityourself”repairs!Thereplacementofinternalfusesalsoshould
be done by an experienced technician.
•No“doityourself”replacingoftubes!Thetubesusedin AMP1
™
are
characterised by exemplary build quality and an extremely long lifespan.
It’s extremely unlikely that you’ll have change tubes as would be the case
with typical tube amps.
Troubleshooting
Faults and possible causes
Maintenance and Service