Visaton's 9063 W170 6-1/2" woofer is designed to be a high performance replacement speaker at a budget price point. A foam surround and ribbed, treated paper cone offer longevity while capturing that classic sound from the golden era of loudspeakers. A healthy 2.0 mm of Xmax and ±7.5 mm excursion limit allows this driver to pump out some serious bass in many different sized sealed, acoustic suspension cabinets. A smooth frequency response makes for easy integration with many different tweeters.