Tube amp with SS like bass

I don't know how much power you need, or what your trying to drive, or how big your room is, or how loud you want to go, but, Audio Research and VTL have the reputation for offering better bass than some of the other lower priced tube competition.

Tube audio design 1000 monoblocks- 100 watts per channel. i have the 60 and it drives my Vandys(86db) with ease...

Second for Audio by Van Alstine. Although his most expensive hybrid (the Ultra 550) is over $2K, the Ultra 350 is $1850. I would strongly urge you to try it out. AVA is direct sale and you'll have 30 days to see if you like it. I think you'd be pleased with what these amps can do. Solid, quick base with excellent articulation, and a midrange and high end that is many times better than the price. It can also drive tough loads.

They make that amp you are looking for it is called BI-AMP

Trust Me check out ROGUE 120 MONOS, They will suprize you. Ive put them next to big solid state, Plinius 250, krell ksa250 ect and the rogue is stronger within its power limits.
If you need mega power A VTL Deluxe 300 will floor you. Its a great Bi-amp amplifier for lows. A rogue zeus is another winner but she is expensive. Iv owned all of these. Feel free to email questions