I haven't seen any good "40 vs. 50" comparisons so it's hard to be sure, but based on what I have seen I would *not* expect the 40s to be at all boomy or slow. If you look at the frequency response curve from Soundstage the 40 kind of rolls off a bit in the bass, definitely doesn't have that "big peak at the cabinet/port resonance frequency" kind of curve. I think the biggest difference between 40 and 50 is that the 50s can play louder... sometimes a cigar is just a cigar


M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8