Ive had this unit for about 6 months now it works amazing the preamp outputs work amazing. I paired this unit with the a series pioneer speakers and buddy let me be the first to tell you that im thinking hooking an amp to the door speakers may not be good for my health as its already super loud. I also used a preamp output to feed my subs its a 4 volt output so the subs (2 rockford d412) sound amazingly clear and powerful. The layout of the unit is top quality and easy to work with as is tge 7 band eq which made all the difference and making the door speakers keep up with the 1200 watts pushing my subwoofers. I could go on but ill just leave you with this buy this deck u wont be disappointed. Make sure u catch a good ground when installing for better signal and clarity.