The VRX918S is a compact, high power, suspendable subwoofer system containing a 2268H neodymium magnet, patened Differential Drive 18" woofer in a front loaded, vented enclosure. The VRX918S was designed specifically for use in arrays with the VRX32LA.
"Stradivarius professional tenor trombone, .525"" bore, 8"" one piece hand hammered Gold Brass bell, F rotor mechanism, open wrap, chrome-plated nickel silver seamless inner slide."