Review on Road Kill RKFR6 Speaker Enhancer by Jaime Benenati

This is a great product for improving the sound quality of your speakers and can be used as a standalone product. However, it is designed to be used with sound-absorbing floor mats on the inside of the doors. I also used foam rollers on the outside of the door. So if you ever need to remove it, you can. I also covered the door panel with styrofoam. I don't experience any rattling or vibration from either side of the doors and the bass you get is huge. Using this soundproofing product will make a world of difference in the sound of your system. I spent less than $500 on the entire system. This is a deck, front and rear speakers, an amplifier and all accessories. Soundproofing and these rings, when used together, completely change the sound of your stereo for the better. I would recommend the Road Kill to anyone replacing stock speakers. What you'll notice most is how they focus the sound in the car. It will be louder and cleaner than before. If you're looking for more bass, you'll need to install sound deadening mats in the door and door frame, or use a foam sound deadening mat.