Get massive sound without losing clarity with these Alpine speakers. The improved Type R technology on this set of two speakers produces accurate tones for greater performance and impressive bass booms for an enjoyable jam. The ultrasmooth tweeters on these Alpine speakers yield smooth sounds that have your party guests coming back for more.
These are great for even an in amped sound system! Installed in my Jeep Wrangler Unlimited paired with a Pioneer AVH-2800BS,Polly fill behind speakers and it ROCKS! No obvious +|- markings on the speaker nor did I find it in the instructions. But got it.