Has anyone compared K150 tubes and the stock EL34s in Primaluna integrated/amplifiers?

Little late chiming back in on this thread, lots of music to listen to 😀

I am am now running all Gold Lions in my Primaluna. Six of the ECC82/12AU7 Gold Lion reissue and four KT-88.   Beautiful mids and highs, bass is deep and accurate when the recording delivers it. Very accurate, very happy. 

Have tried quite a few tubes in the HP Dia prem.

The other nice sounding tube if you like the warmth of the EL34 is the re-issue Mullard KT88s.

great midrange on that tube.

would also suggest the EL 6CA7 Fat bottle. very musical sounding tube.

have also tried the Tungsol 6550 and KT-120s. Both are a great match for the amp, and sound extended on the top and bottom but do not have the midrange of the Mullard '88s or the EL34s.

the other tube not to forget is the first input tube, 12au7. Rolling in a NOS Mullard or other desired choice has a large effect on tonal qualities.

Timely discussion for me.  I recently purchased a the Dialogue Premium HP Integrated, and I'm thrilled with the sound quality of the stock tubes. It's also the quietest amp I've ever had in my system.  I just ordered the KT150s and NOS 12au7 Mullards.  Can't wait to try them out.  I am running them with Harbeth C7es3 speakers in an all analogue system.

Will let you know how it all sounds once they arrive.

Best, Scott

I have I have the hp dialogue premium power amp and was amazed at how dramatic the improvement was by using NOS mullards 12au7s in the v11& v12 positions.  The soundstage was so much bigger and deeper into proac monitors, which have a great soundstage to begin with.

FWIW ..  Before plugging in a higher output example of the 6550,  PLEASE insure the amplifier design will handle the higher load.
Contact the designer of the amp and ask them if there may be a problem.  Without question, it WILL be a tearful experience when flipping the switch and not clearing the launch pad..  pc