Rolling KT150s in Primaluna hp integrated

That’s interesting Wolf. I’m thinking the 150s sound a bit more solid state—in good ways and bad. They seem to be a marvelous tube in their own right. 

Now you have me wanting to hear the 120s too. 

Jb I feel the KT 150 tube is about as ideal an output in a pp design for my purposes. I recently installed a matched quad of cryoed 150s in my quicksilver silver 88s for further refinement, such subtle nuances were further revealed. Don’t really know what is going on but I can’t imagine things getting much better. I hear no downside but then again tubeoholics have different goals and values in what their focus is. It is definitely not a "tubey" or unduly colored tube for those inclined toward that end. It just sounds more like real music to me.

tubegroover,

I appreciate exactly what you are saying.  I think the KT150s are super musical. They are as close to neutral in coloration that I've heard in power tubes.  

Like I said…not sure why but in the amps I used them in (a factory upgraded Jolida 502P, and a Dennis Had "Inspire Fire Bottle" single ended thing) they were too similar to the 120s…since I sold the 150 quad with the Jolida amp I might still try a fresh pair of 150s at some point, but for the Had SEP amp I still have fresh Gold Lion KT88s, Sovtek KT88s (Which are sort of great sounding) and new KT120s…so I'm in no hurry I guess.

If you do go back to the 150s Wolf, try the cryoed, not too much more, less than 400.00 for a matched quad. Got them off a vendor on eBay. They biased very close, very nice tubes. I also have a matched quad of Russian Genelex Gold Lions I originally purchased for my MC-60 amps, few hours. Also tried in the Silver 88s. The uncryoed 150s had more everything, at least in those amps. The cryoed  150s caught me completely by surprise. I offered to lend to a friend to hear in his amps but changed my mind after I put them in mine first. He's getting the other ones.