I would bet on the Rogue Cronus Magnum II KT120 Integrated to fill that bill. I have the Rogue Stereo 100 and it's very powerful, extended and articulate in the deep bass. My friend has the Cronus Magnum II and it's got great bass too. And it sounds quite musical and detailed in the midrange and highs as well. List price of the CM II is $2495 and I don't think you can go wrong.
I use my Rogue on the Legacy Focus SE speakers, which has two 12-inch woofers per speaker that extend below 20Hz... I previously used very good solid-state amps to power them but I like the Rogue KT120 amp better--yes, even in the bass!
I will say that regarding most OTL tube amps, they do have ample bass if they provide enough power, but they will also accentuate the bass quite a bit at the speakers bass impedance peak, which is neither natural or real--only overblown.
I use my Rogue on the Legacy Focus SE speakers, which has two 12-inch woofers per speaker that extend below 20Hz... I previously used very good solid-state amps to power them but I like the Rogue KT120 amp better--yes, even in the bass!
I will say that regarding most OTL tube amps, they do have ample bass if they provide enough power, but they will also accentuate the bass quite a bit at the speakers bass impedance peak, which is neither natural or real--only overblown.