From the Inventors of the Subwoofer a, er, Subwoofer!
One 12” woofer faces forward, while another one sits a few inches off the floor firing into the cabinet. Since both speakers are wired out of phase in a push pull configuration, M&K claim lower distortion and higher efficiency. The internal amplifier provides 400 watts (700 peak) of Class AB, judging by the heat sinks. I forgot to ask the price, but I’m pretty sure it’s expensive and being M&K, I’m pretty sure it’s worth it!