Anyone try KT150 in Primaluna Dialogue Premium HP

would partially agree with samzx12, the KT150s have a nice midrange, but that all changes if you replace the stock coupling caps. Put in some copper foil caps and the KT-120s lose any harshness they have.

but with copper foil caps, my fav tube in the HP  is the PSVANE gray glass KT88s...Open and extended, but super musical midrange with no harshness.

 

I did end up with a set of KT150s.  And, I traded the Musical Surroundings and went with the Manley Chinook phono preamp.  

This is a truly magical combination.  The sound is full, rich, even FR, and it all really works well together.  I've never heard my system sound so good... and not sure I've heard any system sound better.  The KT150s are great, with the best of EL34, plus the power they lack.  I moved the EL34s and KT120s in and out to try options.  But, since I got the KT 150s, I've stuck with them and have no desire to roll any more.

For the KT150s to fit with the cage, my buddy made a set of aluminum "stands".  They have a pin on the bottom, a hole on the top, and are about 1/2 to 3/4 inch tall.  I put a rubber o-ring top and bottom to keep it from scratching, and it works perfectly!  

I don't post much at all here but wanted to express my opinion on the KT150 tubes I just purchased. Quite frankly, it's the best all around tube I have used yet in my PrimaLuna Prologue Premium integrated amp. Besides the stock tubes, which were OK to start with, I have tried EL34L's, KT77's and KT88's from JJ and thought they were decent tubes but all of them had something I didn't care for, mostly I didn't care for their tone in the upper frequencies. My favorites before the KT150's have been the SED Winged C EL34's and the Siemens RFT EL34's. Both of those are great tubes and I will be keeping them around for future use. Then I got curious to try the KT150's. Glad I did. They don't have quite as nice of mid-range as the previous 2 tubes but they are very well balanced from top to bottom and wow, the bottom end is fantastic. The treble can be slightly etched but just on recordings that sound that way with most any tube or amp. Overall I would recommend trying the KT150 without hesitation. Oh, I should mention that the input tubes I'm using are Telefunken and the driver tubes RCA Clear Tops, both of which I purchased from Brent Jesse, great guy to deal with. The PrimaLuna amp is the first one I have owned from this company and it's really a fantastic product. I can see myself moving up to a Dialogue someday. Speakers are GoldenEar Trition One's which are great too. I'm a very happy camper.