What does a subwoofer solve?

search bar is your friend...  this question *might* have been asked before, just maybe ... 😂

If you listen to rap I guess.. boom boom boom...subs are for home theater...never find one in my system, no way...my speakers go plenty low for me....

How many hours have you logged on the Luxman? Sure it’s broken in? 
 

Those BHK 300s look pretty beastly. Maybe they just have better bass control?

Properly integrated sub can sound amazing. Kinda difficult to get there but not impossible. If the room allows maybe consider a swarm type setup. Never heard one but from most accounts it’s a great way to get amazing evenly distributed bass. 

I too am skeptical that the Luxman doen't provide enough bass.  So I'll make a blind suggestion, which may not be the answer but is something to look at.

Every amp has different power requirements.  It is possible that whatever power cords, power filters, etc you have feeding your amp are adequate for the old amp but not adequte for your new amp.  If there isn't enough instantaneous power availble it will show first in the bass.  This has nothing to do with the nameplate ratings on the amp and conditioner.

Thanks for all of the input.  I found a local dealer who will let me borrow a pair of subs for a couple of days, so will probably take that route to start.

As to comments about doubting the Luxman doesn't have enough bass, I've seen it mentioned elsewhere, by other owners, that they too wish for a bit more in the bass.  Perhaps if I hadn't heard it right after the BHKs, I wouldn't know the difference.

But on several recordings, what was clear and dynamic in the bass on the BHKs isn't here with the Luxman.  I've had it almost a year, so completely settled by now. I made no changes to anything except swapping the amps.  The BHKs draw more power than the Luxman, so I don't think that's the issue either