Have a 2020 Sentra just installed the Rockford p300-12 with factory head unit. Ran power wire to battery, ground to bolt under seat and audio input wires to both rear deck speakers. Have the sub setting set on audio sense at high input. When I turn the car off about 5 minutes later the sub turns on and vibrates constantly. Was told I didn’t need a remote wire. Could I run a remote wire from the sub to a fuse holder to fix the issue?
Input Level
Set the Input Level switch to match the outputs of your source
unit.(LO - RCA or HI - Speaker Level)
Auto Turn On(illus.-3.1)
Three different automatic turn-on modes can be selected;
REM(+12V), DC Offset, and Audio.
Remote: Set the switch to REM to use the remote turn-on
lead from your source unit.
DC Offset: Set the switch to DC Offset to detect a DC offset
from the HI-Level speaker outputs when the source unit has
been turned on.
Audio: Set the switch to Audio to detect the incoming audio
signal from your source unit and automatically turn on your
powered loaded enclosure.
NOTE: Using either the DC Offset or Audio mode causes the
REM on the power connector to have +12V out for turning on
additional amplifiers.
4. Verify there is 9 to 14.4 Volts present at the positive battery and
remote turn-on cable. Verify quality connections for both cables
at amplifier, stereo, and battery/fuseholder. Repair/replace if
necessary.
1. Use a different 12 Volt source for REMOTE lead of amplifier.
Set the Input Level switch to match the outputs of your source
unit.(LO - RCA or HI - Speaker Level)
Auto Turn On(illus.-3.1)
Three different automatic turn-on modes can be selected;
REM(+12V), DC Offset, and Audio.
Remote: Set the switch to REM to use the remote turn-on
lead from your source unit.
DC Offset: Set the switch to DC Offset to detect a DC offset
from the HI-Level speaker outputs when the source unit has
been turned on.
Audio: Set the switch to Audio to detect the incoming audio
signal from your source unit and automatically turn on your
powered loaded enclosure.
NOTE: Using either the DC Offset or Audio mode causes the
REM on the power connector to have +12V out for turning on
additional amplifiers.
4. Verify there is 9 to 14.4 Volts present at the positive battery and
remote turn-on cable. Verify quality connections for both cables
at amplifier, stereo, and battery/fuseholder. Repair/replace if
necessary.
1. Use a different 12 Volt source for REMOTE lead of amplifier.
No clue, but DC power flows from negative to positive and an improper ground connection is the most common cause of poor performance, so make sure it's connected to clean/bare metal chassis or chassis ground, preferably coated with a dielectric grease for long term quality service.