5751 tubes and Rogue Tempest?

That's what it sounds like. Mark didn't mention it but was quick to suggest replacing the KT-88's. I think I do remember Kevin Deal talking about the KT-88's on his website.

Samzx12,

I talked with the guys at the shop yesterday regarding their opinion of the sound differences between the KT-88's and KT-90's (it also reminded me again why I went with the 88's). The comments they made were that the KT-88 is a little warmer, more delicate and three-dimensional than the KT-90. The KT-90 having more a little more slam and power.

I hope this helps answer your earlier question about the sound differences between the two tubes. As I mentioned, I didn't audition the EH KT-90 - I just went with the GL KT-88 right out of the gate and have been very happy.

Have the KT90s in my Cronus Magnum, and the GL KT88s in my Ayon Spirit 2 and agree about the sound as Reynolds853 described.

Use Tungsol 5751s in the Cronus, added some warmth