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Front Le Audio Input
Audio Ground Input -
++ ++ + +++ + + + + ++ + ++ + + + +
+ + + + + + + +
+ + + + + + + + + + + +
++ ++ ++++ + + + + ++ + ++ + + + +
+ + + + + + + +
+ + + + + + + + + + + +
Front Right Audio Input
Audio Ground Input - Front Le Output
Front Right Output
(
OPTIONAL
)
(
OPTIONAL
)
Speaker Level Input to Speaker Level Output
Speaker level input to speaker level output is most commonly used when replacing an OEM radio and retaining the factory installed ampliers.
Use this when you need to match levels from a source that only has speaker level outputs and an amplier with speaker level inputs. The RCA input
connectors on the main harness will be used for this type of installation, we suggest cutting them off the harness 3 inches from the RCA end so they
can be used for wired speaker level output. After all the connections are made, skip to the level adjustment section of this manual.
Cut RCA in half from main harness. Then connect to ouputs of L.O.C to provide wired speaker lead outputs.
Level Adjustment
New School –
Required items: Digital Multi-Meter, Test track media @ 1kHz and 100Hz. Max Amplier Line-level Input Voltage Specication (i.e., 4vrms, 8vrms, etc.)
Proper level adjustment is crucial for obtaining the best possible sound quality. Following the guidelines below will enable you to properly set the
output gain of the LP5-2 using equipment that is readily available. Although this device can be set by ear (Old School), we recommend using a multi-
meter and test tracks for pinpoint accuracy and the least chance of noise.
Ampliers usually have 2, 4 or 8v max line-level input ratings but this can vary.
This max line-level input will be your target setting you will read on the multi-meter.
Old School –
1. Start with gain adjustment levels on LP5-2 and ampliers set to minimum.
2. Turn source unit to ¾ maximum volume and play a familiar song that has dynamic attributes.
For example, if your volume goes to 40 you will turn it up to 30 and play a song that has some
quiet sections and some really loud sections.
3. Slowly adjust front channel gain of LP5-2 until just a hint of distortion is audible, and then
back down gain just under that threshold and the distortion goes away. (gure 2)
_
+
Figure 2
Example:
Amplier 1 (Mid/High frequency) has a maximum 4v input voltage, so you will be targeting a 4
volt output voltage from the LP5-2.
or
Amplier 1 (Sub frequency) has a maximum 2v input voltage, so you will be targeting a 2 volt
output voltage from the LP5-2.
1. Start with gain adjustment levels on LP5-2 and ampliers set to minimum.
2. Turn source unit to ¾ maximum volume and start test track
(1kHz for mid/high or full range, 100Hz for sub).
3. Choose either left or right channel - With multi-meter, test output of LP5-2 .
Probe with negative on RCA shield and positive in center of RCA output. (gure 1)
4. Slowly adjust level on LP5-2 until you reach the target voltage of the amplier. (gure 2)
5. Turn volume down and system off.
6. Connect RCAs, set gains on ampliers to minimum
7. Turn system on and ne tune gains of amplier (if needed).
Figure 1
Set meter to AC voltage.
Connect Red probe to Voltage (V)
Black to Common (COM)
3"
AUDIO ACCESSORIES
PAC ELECTRONICS ACCESSORIES
