Passive Stage Subwoofers or Unpowered Stage Subwoofers are generally the ideal solution for the perfectionists out there that want full control over every element of their sound. We offer several lines of premium passive subwoofers that address your Pro Audio needs from venue size to music genre. Using external power amps and crossovers gives you the level of control necessary to tune your PA system to the smallest degree. Less components built in also means you have a lighter cabinet to move and store. Passive subs are the best choice for larger sound reinforcement systems and for those that want more parameters to tweak. Seismic Audio has passive stage subwoofers for all musicians. Be sure and check out our best selling Passive stage subwoofer, the Enforcer II. While you are searching, you can't go wrong with the Magma-118S 18 Inch Passive Subwoofer. We also carry 15 Inch and 18 Inch Passive Subwoofer Cabinets. Shop with confidence, knowing that all of our Passive Stage Subwoofers are backed by our satisfaction guarantee and low prices. As a bonus, enjoy free shipping to the lower 48 US States with no weight limit! All items ship free from Seimsic Audio.