Location of Mark Levinson Amp in 2001 LX470
 

I apologize in advance if this has been asked but I just acquired a 2001 LX470 and the owner told me that the Mark Levinson Amp is blown. After searching under the Passenger Seat for the unit and finding no unit there, I have come to the conclusion that 1. It is not located under the Front Seat or 2. Someone took it out. Can someone please enlighten me?

Thanks so much!