To any of you who got a sub, or an Infinity Basslink, like I did, get some tweeters. The sound quality difference is amazing. The side window speakers are midrange and do not have the higher frequency range. You get more vocals, symbols, drums you can feel, and deeper bass that will vibrate your pant legs at only half volume. I got the idea from others who had posted here about it, and felt it was important enough to start a new thread. Did mine for $20.00,(Walmart tweeters with voice coil) and if I would of understood how much better the sound quality would be, I would have been willing to spend $200.00 "No highs, no lows, must be Bose" but you can fix it.