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dAck!
Instruction Manual
Rev. 1.3
Overview
Thank you very much for choosing the Ack!Industries dAck!. The dAck! is a self-
contained digital-to-analog converter intended for use with high-fidelity audio systems. It takes
as input a digital signal compliant with the S/PDIF standard and generates high quality two-
channel analog signals for use into a preamplifier or integrated amplifier. This D-to-A converter
utilizes the filterless concept devised by Ryohei Kusunoki (MJ Magazine, 1996-7) to provide
focused and cohesive, yet dynamic, sound that embodies many of the features inherent in analog
music reproduction. dAck! is designed to be compatible with a very wide variety of systems,
and its primary design goal is to provide long-term satisfaction to the end user.
Please study this manual carefully before using your dAck!. We ask that you pay special
attention to the important battery usage information on page 3. Understanding this information
will ensure that your dAck! delivers its full potential for the duration of your ownership.
Preparation for use
dAck! should be carefully removed from the packaging. Make sure that both of the
following parts are accounted for: 1)
dAck! chassis
, and 2)
Battery charger
. The charger
requires minor assembly before it can be used. Please refer to Appendix A for instructions on
how to prepare the charger for use.
Place the unit on a stable support surface in a location where it will not be knocked over.
As with any high-fidelity equipment, a good support surface may improve its performance by
isolating it from external vibrations. Do not place any equipment or small items on top of the
