Here is what I found on this vehicle, hope this helps.
MIDLINE/INFINITY l SYSTEM
- Remove right under panel silencer/duct
- Remove two retaining nuts to remote amplifier.
- Pull amplifier inboard and then pull downward to remove from upper retaining clips.
- Disconnect two wiring connectors.
- Remove remote amplifier from vehicle
INFINITY ll SYSTEM
- Inside trunk, pull the trunk liner aside (right quarter panel passenger side)
- Remove three retaining screws.
- Disconnect two wire connectors.
- Remove remote amplifier from vehicle.