Much different than it's lil brother, you keep the final in the radio and dont have to strip parts out. Install a switch to even turn it off completely. Much easier install, pretty good watt's also. I was gonna buy an rfx-75 but now i changed my mind, few xtra bucks gets double almost tripple the watts. If you're gonna hate these lil gadgets then dont get one, not everyone can afford a Texas star and a huge power supply.