Don't know about RMS, but you can check it out here - http://www.caraudiodirect.co.uk/kenwood-kdcw4644uy-p-7223.html?cadid=5ld942jvaes4u2rbqtibnvr5o0Planning to add a very small subtle sub to it at some point, as well as better components. I love the radio text feature. It tells you what song you're listening to, and what song is coming up next!