KHE ACS SERIES – USER MANUAL www.KHE-AudioElectronics.com 8 / 23
The Attenuator Insert is an post-amplifier pre-speaker insert loop. It lets you use an power attenuator across all
amps and attenuate the volume of all amps simuntaneously, and switch the attenuated output signal to all
connected cabinets or loads. The Attenuator Insert feautre is disabled by default (both S-LINE send and S-LINE
jacks are wired in parallel). By activating the Attenuator Insert Loop, the parallel connection of these jacks will
be removed so they can be used as a serial insert loop.
WIRING & SETUP
To activate the Attenuator Insert, follow this setup procedure:
1) Turn off the ACS and all amps and attenuators.
2) Connect the Input of the Attenuator to the white S-LINE SEND jack of the ACS. This connection sends
the speaker-signal from the amplifier to the input of the power attenuator device.
3) Connect the Output of the Attenuator to the white S-LINE RETURN jack of the ACS. This connection
sends the attenuated speaker signal back to the ACS to be switched to a speaker cabinet.
4) Power on the ACS and activate the Attenuator Insert funtion by entering the SETUP MENU and push
AMP-SWITCH 4. In case no attenuator is connected, the insert loop won’t be activated (AMP-LED 4
will blink four times). See « SETUP MENU » for more details. Don’t miss this step!
WARNING
Connecting an attenuator without having the Attenuator Insert activated may damage your amps
and attenuators!
Never change the wiring of the S-Line Jacks while the ACS, the attenuator and the amps are powerd
on! Removing the connected attenuator while the ACS is on can lead to no-load scenarios !
When using active attenuators, such as Boss Waza TAX, make sure to power-on the ACS before the
attenuator or turn the ouput volume down while the ACS is powerd off. Otherwhise oscillations
may happen on the attenuator.
NOTES
The KHE ACS is compatible with all type of attenuators : Boss Waza Tube Expander, UA OX Top Box,
Palmer Power Pad, SPL Reducer, Harley Benton PA-100, Bugera PS1, TAD Silencer, Jet City Attenuator,
Weber Attenuators, Koch Attenuators, THD Hotplate, Rivera Attenuators and many more.
ATTENUATOR INSERT
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