KHE ACS SERIES – USER MANUAL www.KHE-AudioElectronics.com 10 / 23
the construction of the amp (channel-volume, master volume, fx-level) and probably needs some trial
and error.
Clean power sources & wiring is needed to make the fx-loop switching work without noise, hum, or
clicking.
Gates in the fx-loops can be side-chained from the tuner output of the ACS. Make sure to use a
isolated power-source with only the gate powerd by this power output. Depending on the gate circuit,
this may can cause a slight hum (ground-loop). If this is the case, it’s best to use an isolation
transformer at the key-input to remove any ground-loops.
When setting everything up, start small with only 1 pedal, test, add another pedal, test, and so on.
This way it’s easy to identify problems with wiring / pedals / power sources.
The switching path is completly passive with no active components in the signal path. High-quality
relays were used for the switching procedure.
The FX-Loop switching feature does not add fx-loops to amplifiers without one!
The TUNER OUTPUT lets you feed a guitar tuner in parallel to the input signal. The buffered input signal is
always present at the tuner output jack.
The tuner output can also be used to record a clean di-track of your guitar, simultaneously to the amplified
track. The tuner output can also be used to side-chain a key input of a gate pedal in the fx-loops of the
amplifiers.
The KHE ACS plays very nicely along with re-amping setups. Connect the DI output signal from your DAW to the
GUITAR INPUT on the rear of the ACS by a reamping box to feed your entire amp collection. You can override
and disable the rear input signal by plugging in the guitar directly into the front guitar input of the ACS.
The GROUND LIFT helps to eliminate hum and buzz from sub-optimal grounding schemes.
Activate the GROUND LIFT by entering the SETUP MENU and push AMP-SWITCH 3. See « SETUP
MENU » for more details.
In case ground loops occur, NEVER defeat or remove or an amplifiers safety ground, PROTECTIVE EARTH,
which is provided by the 3-prong AC power-cord plug! Doing so may not only be ILLEGAL, but it may also
pose a SHOCK or ELECTROCUTION HAZARD.
The RECALL MODE automatically loads the last activated configuration on start-up of the ACS.
Activate the RECALL MODE by entering the SETUP MENU and push AMP-SWITCH 1. See « SETUP MENU » for
more details.
In case a configuration cannot be loaded (due missing or removed cabinet), the amplifier won’t be
enabled. The Recall Mode gets deactivead automatically once the LINK MODE gets activated.
TUNER OUTPUT
RE-AMPING
GROUND LIFT
RECALL MODE
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