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ページを印刷する10. Pre-Amp Outputs: These RCA connectors should be connected to
the next component after the LC7, such as a signal processor, crossover
or amplifier. Do not connect any speakers directly to your LC7. (Defi-
nitely don't connect to any home appliances, like your microwave.)
11. Level Controls: These knobs allow you to adjust the signal level
from your source unit to match that of your aftermarket amplifiers. Be-
cause they are amplified, most factory-installed source units have rela-
tively high signal voltage output, which will require you to decrease the
signal level.
12. Channel Summed Indicators: Under the cover of your LC7 are
jumpers that will allow you to sum selected channels into the main chan-
nels. This is especially useful for factory-installed systems with actively
crossed-over speaker systems. These indicator LED's let you know
which channels are being summed into the main inputs.
13. Source Indicator: The LEDs indicate which source unit is feeding
into your LC7. Either main or auxiliary.
Under the Covers
Output Summing Jumpers: Jumpers that allow you to select which
input signals will be summed into the Main outputs. When the jumper is
in the Summed position, there will also be a corresponding green indica-
tor light on the front of the LC7. The shipped-from-the-factory setting is
in the separate position.
Ground Isolation Selector: Occasionally alternator noise may ap-
pear in a system because the source unit and amplifier are using different
grounding schemes. To help in this situation, we have provided alterna-
tive grounding connections. Make sure
your system is turned OFF before you move
these jumpers.
Aux Input Grounding: These jumpers
allow you to select between "Balanced" and
"Unbalanced" inputs for optimum noise
performance on the auxiliary input.
Factory Settings
Ground isolation
Summing Jumpers
Aux In
Shipped
Isolated
(but not lonely)
Separate
Unbalanced
Figure 3: Inside view of LC7
Options
200 ohm or Ground
Summed
Balanced
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