2002 with Mark Levinson audio. I replaced the blown factory sub with a Dayton Audio 8” 8ohm dual voice coil sub today. I'll put more details and advice in the comments for
Lexus IS250 IS350 IS200t IS300h XE30 Mark Levinson Speakers A SET **PRE-ORDER** | eBay
Mark Levinson Mark Levinson Premium 6.5-inch Metal Pot Bass Car Speakers Dr. Harman - Vacuum Cleaner - AliExpress