I’m running a 300B set amp and am wondering if anyone has a good setup that provides good midbass. My bookshelf speakers and subs do well except for midbass with rock music.
Sub + satellite solution is likely where all your troubles are coming from. They likely are crossed-over with high order (reactive) filter which is not ideal for a SE amp (tube or SS, really doesn't matter much).
Yeah you are right, the node 2i has 24db slope. I’m also thinking the rp600m’s don’t have a lot of energy from 100hz to 300hz range.