I think we're all getting terms mixed up. Mids can be detailed and sucked out at the same time, sucked out just means they're not forward but recessed. Also, I find nothing "dynamic sounding" about the Lambda Pro, it doesn't have hard hitting bass, and does not have the most amount of bass by far. The 404LE and 404 quite obviously have more, to me, with the 404LE having the harder hitting bass. If anything, the 404LE is the one trying to sound like a dynamic, to me. And you're right, I don't get how an amp could make the O2 more forward and dynamic and then make the 404LE less forward.