I couldn't find anything out on the Lexus web site other than the basics:
Anti-theft protected 9 speaker, 3 wave-band radio and Dolby stereo cassette system.
Compact disc player with remote 12 disc CD autochanger.
Radio features automatic height adjustment aerial, one-touch tuning with 18 presets and full network scanning facility including RDS.
But what I'd like to know are the real details: brand, power output of the speakers and sub, impedance, what size is the sub (8/10/12"?) etc.
I look forward to your replies.