I have searched for awhile and have not found anything on this has anyone replaced the B&O sub woofer with a plug and play speaker if so what speaker and harness did you use?
Having been through this with and without amp, I highly recommend amping your replacement sub. The Kicker 500.1 works perfect, can use the existing sub line inputs for the amp signal. Super easy and worthwhile, honestly wouldn’t recommend messing with it without adding an amp. Swap all the speakers and you will have an amazing system.