In-Dash
tm
HPX
Owner’s Enjoyment Manual
7
up to 13 volts (peak) to your amplifier’s inputs. Check with
your amplifier manufacturer to determine exactly how
much voltage they can really handle. More info on this in
the section on “Level Matching”, page 13.
12. Crossover Frequency Selection:
Under the top
cover of your HPX lies a plug-in module that controls the
crossover functions. This module selects the frequency that
the front and rear outputs of your HPX will play down to as
well as determining where your sub-woofer will begin playing.
Shipped from the factory, the crossover is set at 90 Hz.
13. Crossover Bypass:
To crossover or not crossover. . .
that is the question. With the HPX, it does not matter what
your answer is because we give you the ability to do both.
Changing these jumpers allow you to run the HPX front and
rear outputs in either full-range or high-pass mode depend-
ing upon your system requirements.
14. 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
HPX in the green mode.
15. Ground Isolation Selector:
This feature allows
you to change the power, supply ground for different
systems. When the HPX 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
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, make sure you turn the
system off, carefully move the black jumper from the center
two pins (Isolated) and move it to either the top two pins
(200 ohms) or the bottom two pins (ground).
At this point, you have to ask yourself, “Do I feel lucky. . .
or do I know what the heck I am doing?” If the answer is
“No”, then you need to drive to your nearest authorized
AudioControl dealer before you get in over your head. Make
the right choice while you can!
