I would be very happy about suggestions for improvements ect,was sold with a friend of the facilities and he recommended this stuff to me. Wanted to listen to what others say about it So, as a radio I already got a Alpine CDA-9812R about 2 months ago,and must say that I am more than satisfied with it Front system: Audio-System RX 165 Pro Power Amp: Audio-System TWISTER F4-600 Woofer: Atomic Manhatten 12 achja,driven focus,only so to the info if someone already installs something of it in the car t has please give also your opinion to it