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Great to own my second IS f... Been thinking of upgrading my audio system although I do not want to replace the headset unit nor LCD. Has anyone had any experience using Audio: AmpPRO 4 Amplifier Integration Interface to add an amplifier?
How does it affect the steering wheel buttons?
How does it affect the LCD features?
How does it affect any other features that the Mark Levinson audio system provide?
How does it affect Grome vLine if you have that as well? AmpPRO 4 Amplifier Integration Interface (AP4-TY11)
Audio: AmpPRO 4 Amplifier Integration Interface
