Lexus LS460 Mark Levinson Amplifier failure problem cause RESOLVED! 

Thank you for posting, because of your video, I knew what to look for when I replaced my amp. Kudos!

Thanks for posting. I've also heard the the pressure vent (rectangular black piece right above the amp) can fail allowing condensing moisture intrusion.

Thanks so much for sharing.. the info is really useful.

Those vents are in place to prevent windows from blowing out from heat pressure build up, and the pressure caused by getting in car and closing door.

Who fixed your amp? My radio just stopped working also.

Thanks for sharing. What year is the LS460?

Does anyone know what the speaker impedance is in a Lexus LS with the ML system?