Brand New Genuine Eminence Delta Pro 12-450A made specifically for the Mackie SRM450 V1.
Eminence takes the weight out, but leaves the performance in with the addition of a lighter weight version of their popular Delta Pro 12A, the Delta Pro 12-450A.
Utilizing a 56 oz. ferrite magnet, the 375 watt Delta Pro 12-450A is recommended as a woofer or mid/bass in vented enclosures, and also makes a perfect replacement in many portable PA cabinets, including Mackie’s popular SRM450 Series loudspeakers (version1). The Delta Pro 12-450A also features a 2.5″ voice coil and a usable frequency range of 44 Hz to 4.0 kHz. See additional specs here: pdf