Crescendo recently released their Contralto series subwoofers late 2015. After over a year of development and prototyping they managed to compile a high power handling, ground pounding monster into an affordable package. These subwoofers feature an 8-layer 3″ voice coil, 8ga push terminals and a triple stacked motor weighting in at 63lbs (10″ model). This 2500w RMS driver comes in a 10″, 12″, 15″ and 18″ model.
To learn more, visit: http://store.crescendoaudio.com/