I bought 2 sets of 4 ohms versions speakers Thinking that the postive reviews where right (More Postive then negative) And boy was I wrong. Lets start off I had them hooked up to a INFINITY REFERENCE 475A amp that produces 75 watts RMS X 4, The amp was half way up, I would say 37.5 watts RMS X 4, Three days latter 1 was toast, In the next 2 days one kept losing the tweeter, I took the door apart to find the tweeter came unscrewed, I went to screw it back in after peeling the sticker off the back of the speaker to find the screw, It was stripped out then I had a problem with the back one 2 weeks latter it only worked when It wantted to I soitered wires to the terminals, So I knew that was not a problem, Now I had 1 speaker working, But removed it to start over, They sounded Like they cost CHEAP, Ive been doing this for 14+ Years in many cars and trucks And tried to go cheap and got burned! Do your self a favor and spend a little more now to save you latter.