These speakers work pretty good. The subwoofers are perfect so far... I've had them installed and amplified with 100watts true rms. The tweeters cut out at about 3/4 the power my amp delivers at about 3/4 the volume on my head unit. The speaker wire is not removeable in the tweeters, its made into the speaker and its very thin, non copper ground and power wire, I have 14 gauge copper from amp to about 4 inches of their wire to the tweeter and I know that its just not getting the power it needs through that 18-22 gauge crap they have stock wired. The crossovers are simple and easy to hook-up, these come with no instructions on how to hook up, but you can find out online everywhere to get how to's. Overall, they sound great at a medium to low volume. Very affordable and great as a replacement to stock stereo sound. I would not get these again personally because I love loud music and I can't get that through this set. Im going to be getting 4 new tweeters with no pre wire, so that I can hook up how much power I want. These speakers can not handle the power claimed, I promise, but they are great for this kind of money.