Lush and Romantic Tube Amps

What I learned along the way is that NOS rectifier and driver tubes are vastly superior to current production versions.

                                                  Fact!

Like some have suggested, I highly suspect that the warm sound the OP is looking for is only available in lower powered tube amps.  This will require an efficient speaker.

In addition to my 89db neutral speaker running on a 300wpc neutral ss amp, I have a 100db speaker dedicated to flea watt tube amps starting with the 300b.  Bummer it’s not efficient enough for 45 2wpc tube SET amps some say sounds like the best SET tube - I’ll need a much larger speaker (which won’t fit my rooms) to increase efficiency.

Surprisingly, the setups I've heard so far that could be described as lush, warm, and romantic utilized SS amps. One used a Vitus integrated and another an Esoteric Class A power amp. 

My experience with higher powered tube amps is that they give highly realistic sound with plenty of excitement. I am using one, a Lab12 Integre 4 MKII and I definitely won't describe it as warm and romantic. 

Jadis are known for the type of lush sound you are looking for.  Very expensive new, however, more reasonable on the used market and very well constructed.

FWIW.. For lush sound,  the type of tubes you are using plays an important role here.  As for brand of amplifier,  I have always found Quicksilver Audio's amplifiers to produce this type of sound.  Have had my Quicksilver Mini Mite monoblocks for nearly 17 years now and have yet to tire of them.

I found the lush, warmth and detail in an unexpected place.  The Absolare integrated beat my former MBL rig.  Sold everything to get it.