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DD-8 Power Ampliers
Operation Manual 11
BaSIc operatIon
NOTE: It is possible to have a situation where Signal Sense cannot function if the Power
Save feature is also used and has been activated. For example, Signal Sense will deactivate
channels without signals after 30 minutes. If all channels are deactivated, Power Save will
be enabled after an additional 30 minutes of no signal. During that additional 30 minutes,
Signal Sense will continue to function and will activate any channels that receive an
incoming audio signal. Once the Power Save standby mode has been enabled, Signal Sense
will not be able to function requiring the DD-8 to be turned on again via the front panel
standby button.
NOTE: In some cases, audio signals with very low output may not activate the Signal Sense
circuitry in a timely manner or in some cases, not at all. This could occur with music or audio
that begins with very soft or quiet passages or with abnormally low-voltage source signals. If
the Signal Sense circuitry will not reliably activate channels within the DD-8, it is suggested
to use either the front panel standby button or trigger input control for proper operation.
10. Trigger In/Out
Provides connectivity for remote 5-15VDC trigger signals used to activate and deactivate the standby
mode of the DD-8.
The Trigger In and Out connections can be used to activate and deactivate the standby mode of
the DD-8 from devices such as remote control systems, preampliers or other external devices. The
Trigger In and Out connections are duplicated for both 1/8” (3.5mm) mono mini-plug and phoenix-
style connectors. Use the Trigger In for making connections to external control devices that will
activate and deactivate the DD-8 standby mode. The Trigger Out does not provide DC power on its
own, but can be used for making Trigger In daisy-chain connections to additional DD-8 ampliers or
other components that need to mimic the DD-8 power state.
NOTE: When a remote trigger is connected it will override the front panel standby button
operation.
To install a trigger cable:
P Power the controlling source and DD-8 amplier o.
P Connect the trigger cable to the controlling source and the DD-8 amplier.
P After the connections are made, power on the controlling source and the DD-8 amplier. After the
source unit is fully powered up, the LED power indicator on the front of the DD-8 should be lit BLUE.
P Verify the trigger is working by putting the source unit into standby mode. The DD-8 amplier after
a short delay will also go into the standby mode and the power indicator will light up RED.
P Once you have veried that the trigger cable is working, only use the source unit to power on and
o your DD-8 amplier.
WARNING: When installing the trigger cable, never have
the controlling source or DD-8 amplier powered on.
Doing so will cause the trigger device to work improperly
and could cause damage to both the source and amplier.