You are looking at an ULTRA RARE USA MADE Boston Acoustics 13" oval competition Subwoofer! These were designed a quick change soft part and coil Subwoofer! Designed for competition! Get it while you can!!! Thanks for looking, I am a 15 year ebayer with over a 2000 positive Feedback!!! Check out my other auctions, or got to my store "Legends of Car audio".