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grounding choices. Experiment with different settings if you run into this
problem. To change the settings, turn system power OFF, move the black
jumper from the center two pins (fully isolated) to either the top two pins
(ground) or the bottom two pins (200W).
Short course in Signal-to-Noise Ratio and
Level Matching
Signal-to-noise ratio is the difference between the signal level and the
noise oor of an electronic component. The higher the signal, the better.
Since you really can’t reduce the noise oor, signal-to-noise ratio can
be readily improved by raising the signal level. It’s best to get the signal
level up at the beginning of the signal path. The signal-to-noise ratio will
only be as good as the noisiest component. Which is why it’s important to
have a quiet head unit. This “weakest link” theory is the basic idea behind
setting levels in your car’s system. And that’s why AudioControl provides
gain in its signal processors.
Level Matching is about making sure you run just the right amount of
signal into an electronic component. If you send too much, you’ll experi-
ence the not-so-joyous sound of clipping. At the same time, you want
the highest possible signal levels for best signal-to-noise ratio. Since all
AudioControl products are capable of high-voltage input and output, it is
important that you MATCH the input voltage of your components. Most
crossovers and ampliers can handle up to about 2 volts before they clip.
AudioControl signal processors can all put out at least 7.5 volts RMS, and
can take in 9 volts RMS. LED voltage indicators on many of our products
make it a snap to set levels! Want to learn more about level setting? Check
out the video in the support section of the Mobile Audio pages at www.
audiocontrol.com Also available there, is Tech Note 1006 for those more
technically minded.
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