µ-Dimension Glow DSP8 Instruction Manual page 5

If the voltage of your vehicles charging system drops too low even
the most expensive of audiophile rated amplifiers will drop below
their rated output. Make sure your charging system is in good
working order. If you are unsure if your charging system is working
properly have it tested by a qualified professional technician or take
it to a certified authorized dealership.
Connecting the Ground
WARNING: NOT FOLLOWING THIS DETAIL CAN CAUSE YOUR
DSP8 TO NOT FUNCTION PROPERLY, INDUCE NOISE INTO
YOUR SYSTEM, CAUSE DAMAGE TO SYSTEM COMPONENTS
AND CREATE POSSIBLE COMMUNICATION ISSUES WITH
YOUR COMPUTER INTERFACE!
The ground wire should be connected directly to the chassis of your
vehicle. Find a clear location on vehicles inner body or chassis
nearest to your amplifier and remove all paint, sound deadeners
and other coverings exposing bare metal. Using a #10 or larger
screw to secure it to this location. NEVER USE A SEAT BOLT OR
VEHICLE BOLT AS A GROUNDING POINT!!
Remember the ground wire must carry the same high current as the
positive power wire. Make sure to use the same gauge of ground
wire as your power wire. Make sure that the ground wires from your
vehicles battery to the body meet or exceed the gauge of your
amplifiers power and ground wire leads.
Tune Safely
Do not try to do all of the system tuning in a single session. It is
good practice to spend only an hour or so tuning a system at any
single session, and to use several or many sessions to complete
the process. The human hearing system can become fatigued when
concentrating on critical listening for extended periods, so breaking
up the tuning process into several shorter sessions over a several
day period will be much more effective, and usually yields better
results.
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