I have a set of Kef 104/2 Hi Fi speakers. They each have two 10's mounted horizontally facing up inside the cab with a substantial metal bar going right up through the middle. The whole box is the woofer with the mids and tweeters in their own cab bolted onto the front. Never seen anything like it. Very loud tight bass.I want us to! You said a driver is a driver. They're not! There's a huge difference between a hifi speaker and one meant for pounding bass, or guitar, or PA use. And there is possibly no more demanding source that a high powered bass amp fed by an aggressive played bass guitar. Way different than a music source. These are really very different technologies and applications, with very different goals.