New KT150 tubes?

My Jolida Fusion 3502 , not the S model  has much more premium parts
And has many upgrade options.
I use all 19 50s preamp tubes Big upgrade and  switched out the very sweet EL34 
Power tubes 50wpc.  Now the KT 150 tubes up the power to 80 wpc.
The midrange is almost as sweet as thd el34 ,but better by far in the midbass low bass dynamics much more slam soundstage depth as well as size is bigger.
Online a matched quad  $270 delivered. Fantastic tube. If using a smaller or older amp check first. Upgrade to bigger power supplies if possible to optimize for this tube.

Add the new VAC IQ 200 to the list.   KT88 stock but can roll KT120 and KT150.   

Kevin Hayes said all tests between KT88 and KT150 in the factory and dealer sites, KT88 win hands down.   Very interesting!

Not sure that statement is true or it's subjective but what kind of KT88 is Kevin Hayes referring to? I have some EH KT88 and tried them in my Primaluna Dialogue and didn't care for them at all. The TS KT120 sounded better and that wasn't saying much.

Kevin is highly complimentary of the Gold Lion KT88 reissues, as is Roger Modjeski of Ram Labs and Music Reference.

The KT150 is a fantastic tube, but after a year they seemed less so, and I perceived that they were putting some strain on my beloved Jolida 502p (ear to speaker I could hear the Jolida softly saying, "help me…help me…"). Back in April I put in a set of matched and balanced (I assume "thetubestore" uses a small scale to balance these as they do seem to be the same weight) Gold Lion KT88s and they're sounding beautiful, and I think the gold lettering and their reputation have a large influence on my shallow and obvious "low threshold" sense of what's good. These tubes are REAL good, and my amp seems happy (!). The KT150s are still great, but it is harder now to tell how great they are since they're now in their boxes on a shelf…but hey…they're great at being in their boxes also. They're not trying to climb out, not getting dusty…friggin' great.