OK the mini dsp is in. I've played with it, and first I was disappointed. Then I changed one knob position on the amplifier, and all of a sudden the tweeters came alive : I had channels turned off with a switch. I'm very happy now. everything is clear, sound nice. I have a lot of work to do. I have never used a parametric eq in my life. I have never played with time alignement. So there is a lot of work to do.Gains were set again. I was afraid of loosing output : thanks M5, you gave me confident in this system. It's louder than I would have thought !!! The mini dsp is in the glove box, powered by usb. I need to try a "usb split" , because I need my usb devices to play my music. I hope I will be able to find one. Or I will need to power the dsp another way.