RS6 LO to Brax DSP to Sinfoni Amps Class A and A/B to Focal Utopia. Impression made as compared with previous DAP Fiio M15.I thought for a minute you were pulling my legDidn't even know the Focal makes Utopia car speakers. So, you are driving car speakers directly from 3.5mm output of RS6, or is there a crossover and some amplifier, etc? I thought you need to have a separate crossover for car speakers, especially to separate sub-woofers. And I would imagine you have some amplifier for your car speakers? Have you tried driving it with LO output from RS6?
https://www.audiotec-fischer.de/en/brax/processors/dsp
http://www.quartorigo.com/JustForFriends/
https://www.focal.com/en/car-audio/car-audio-kits-solutions/elite/utopia-m