Connecting a pre-amplifier or power amplifier
Connect a power amplifier to the unit to use it as a pre-amplifier, or connect a pre-amplifier to the unit to use it as a power amplifier.
When a pre-amplifier is connected to this unit and the unit is used as a power amplifier, turn power amp direct mode on. link
Never insert the short-circuiting pin plug into the PRE OUT terminals. Doing so could result in damage.