Like the title say, I have a box for a 10" subwoofer, and a passive crossover in my e39 540i. They were made my German Audio Specialties, which is out of business now, but was known on this forum for their products. I'm getting rid of the car, and would rather that these components go to an enthusiast. I also have Soundstream amps, a Dayton 10" sub, and Audiocontrol LC8i signal processor. Make me an offer for any of it.

Everything I have is visible on German Audio Specialties' Facebook album "Fixing an e39 DSP System".
https://www.facebook.com/pg/germanaudiospecialties/photos/?tab=album&album_id=622518427794358

Email might be a better way to contact me, since I'm not active on forums, but I will try to check back here. nw.karlsen@gmail.com