2
dAck!’s vent holes. If you would like to prevent dust from entering the chassis, it is OK to cover
the unit with a light cloth when not in use.
Familiarize yourself with the dAck!’s inputs, outputs, and controls. The following
figures show the important features and their purposes.
Connect the input of the dAck! to your digital source’s digital output. Best performance
will be obtained if you use a 75
Ω
cable with 75
Ω
terminations (if using BNC, keep in mind that
BNC termination alone is not an indicator of matched impedance; many BNC terminations have
a non-75
Ω
impedance spec, usually 50
Ω
). Next, connect the dAck!’s outputs (
Red
=right
channel,
Black
=left channel) to your pre-amplifier or integrated amplifier inputs using a high-
quality pair of interconnects.
Plug the charger unit into an available power outlet (120VAC) and connect the charger’s
output to the
charger in
socket on dAck!’s rear panel. The quality of power supplying the
charger has no effect on sound, so the charger needs not be placed on a specially conditioned AC
circuit. It is advantageous to place the charger in a location where its indicator lights will be
easily seen.
Operation
When the switch is in the up position, your dAck! is energized and ready for use. A blue
indicator will illuminate, showing that the circuit is receiving power. When there is a compatible
signal at the digital input, a green indicator will also illuminate, showing that there is a data latch.
Some digital transports maintain a datastream even when not playing while others latch only
when playing music, so the behavior of the latch indicator will depend on your particular
transport. The dAck! is designed to latch quickly to incoming digital signals. If for some reason
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