In-Dash
tm
THREE.1
Owner’s Enjoyment Manual
7
10. Input Gain Control:
These potentiometers (aka
“pots”) are used to increase the amount of signal voltage to
your power amplifiers. With these controls you can provide
up to 13 volts(peak) to your amplifier’s inputs. Check with
your amplifier manufacturer’s spec’s to determine exactly
how much voltage they can really handle. More info on this
in the section on “Level Matching” page 12.
11. Crossover Frequency Selection:
Under the top
cover of your THREE.1 lies a plug-in module that controls the
crossover functions. This module selects the frequency that
the front and rear outputs of your THREE.1 will play down to
as well as determining where your subwoofer will begin
playing.
12. Illumination Selection:
These jumpers let you
change the backlight illumination to green or amber. Given
our devotion to protect the rainforest, we have shipped the
THREE.1 in the green mode.
13. Ground Isolation Selector:
This feature allows
you to change the power supply ground for different sys-
tems. When the THREE.1 is shipped from the factory, the
selector is in the fully isolated position (which is generally
the best). Alas, not every manufacturer (or installer) devotes
so much time into getting their grounds right. Therefore, we
have provided other ground isolation options to help if you
have a ground loop noise(alternator whine)in your system.
Experiment with different settings if you run into this type
of problem. To change the settings, turn the system off,
carefully move the black jumper from the center two pins
(Isolated) and move it to either the top two pins (200ohm) or
the bottom two pins (Ground).
If you don’t feel comfortable with everything you have
read up to this point, run don’t walk to your nearest autho-
rized AudioControl dealer and let them install it. Life is too
short to be tearing your hair out over your car audio system.
