I almost returned my 2014 LS460 L after the first 2 days due to the ML sounding so tinny. I understand the bandwidth limitations of XM, but the entire sound system was disappointing - even taking phone calls through it sounded so bad I was embarrassed to answer if I had a passenger. I ended up setting the fader to almost entirely in the back, which sounds a little better, but still pretty bad. Also, what's with the XM tuning? You can't see a directory of channels? I asked the sales guy about it and he says "well, you need to know the number of the station you want to listen to".... I should have returned it then and there!

 

They were probably being paid by the hour. 2000 hours of calibration have never sounded worse. An aftermarket PC sound based system with a ASUS modified sound card and the right software and tuning, as well as top notch aftermarket speakers and solid amplification would completely blow the doors off the ML / 2000 hour system.

A good DSP tuning would only require a few hours if the processing power and programming / software are up to snuff.