Up for sale 1 Brand New Replacement 10″ inch Heavy Duty Woofer Driver 8 Ohm 200 watts. This makes a great replacement for Bose 501 Series IV Speaker woofers and will make your Bose’s sing with new full deep rich sound. Rubber surrounds always sounds better then foam surrounds and lasts much longer then foam. Plus, why spend all that time and labor gluing the same foam problem in place when changing the whole woofer takes just a minute or two and you’re up and running right now with great sound. Free Shipping !