Anyone Bi-amping with tube high & solid state lows

Not now, but I did that in the past (when a tube amp was what I had on hand). Don't let anyone tell you that the different types of amplifiers have different sonic characteristics that will be a problem. Remember, they are driving very different types of loudspeakers, and the difference between loudspeakers will swamp out any subtle differences of amplifiers.

The monster biamped systems I have seen actually went tubes on both . But tube and SS on bottom would also work great !

add an active sub to tubes and there you go...

Yes, I am.........I am using (now) the ASL Hurricanes (tubes) for the top and a Perreaux 3150B (SS) for the bass. I did a full review of the 'canes describing the amplification for my system. Take a look at it under product reviews.

RWD

I'm doing this. My speakers are Martin Logan Odyssey, the amps are a Classe CA-200 for the bass and a Counterpoint SA-220 for the top. The speakers are set up for biwiring/biamping, so that was easy. My preamp is a Counterpoint SA-11 and it has three sets of outputs so that was also dead easy. One set goes to each amp, the third set goes to the subwoofer inputs. I use the crossovers in the Odyssey. Level matching started out a little tricky but I also got incredibly lucky in this area. Although the spec ratings for the two amps are fairly different (7 dB) measurements showed that they were close to 2dB apart, with the bass amplifier a little too hot. Then I remembered that the speakers have a 3dB cutout switch. This is intended to help in bass-heavy rooms, but in my case it turns out to only cut bass by around ... 2dB! Incredible luck.