Realizing that I don't have the MB optical and they returned to the coaxial system. I have the MBUX with the entry Burmester system. Was originally going to go with the MoBridge interface and DSP. I thought I could intercept the signal before amplification and convert to Toslink while keeping the factory amp and speakers while providing the optical out to my JL VXi 1000/1 amp that would power a JL Audio 12W 7. Spoke with Frazer at MoBridge who is the head tech guy.