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
Bose Surround Speakers 700 (defekt) in Niedersachsen - Bad Bentheim | Lautsprecher & Kopfhörer gebraucht kaufen | eBay Kleinanzeigen
Gira 569403 Speaker Connection 4-Way Insert Pure White : Amazon.com.au: Home Improvement