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I might just have to add the 12BH7 to my cart. Thanks for the quick feedback.
I cannot speak for the Ember but only for the Horizon III.
6SN7 sounds round, balanced and fuzzy warm. This is the RCA 6SN7 that Jeremy supplied when i ordered the adapter + 6SN7 tube. My only gripe with it is that it tends to get a little boring to listen to IMO. Then again my listening sessions go for hours...
The EH 12BH7 of mine is still burning in but it is a very exciting tube. Maybe a little bright for my tastes but we'll see how it flowers in the long run burn-in.
For the 6N6P, the one I got from Garage1217 seems great. I haven't put too much time into it.
@Luckbad Been following you for a bit and thank you for the LPS recommendation. The step from SMPS to a LPS was massive for my Project Horizon. Now I want to build my own R core for it, being that 48V is very hard to find pre-built. Also curious to know how Atomicbob's noise nuke sounds! Very curious.
As of right now I'm really enjoying my GE 6189 12AU7. I think it was like $14? I don't know what it is but this is a really enjoyable one for me. It seems very well balanced and neutral across the board with a find level of detail. Intimate soundstage and tight midrange. Not too extensive on the low bass but hey I can't expect too much from my HD600s. I'd recommend this tube.
So.... I love the clear top rca 12au7 that comes with the Horizon. Pretty much top of my tier list for the tubes that I have handy. My personal favorite. It just sings to all audio thrown at it whether it be dance music, acoustic from Michael Hedges, fps gaming...
As for the 12BH7 by EH I feel that it's on par with the clear top but with a different flavor, where it is smoother all around. Just I don't feel it has the excitement of the clear top.
I have a couple tubes coming in
-NOS 1956 Sylvania Philco 12BH7A
MOST excited for the Mullard. Jeremy at G1217 said he preferred Mullard tubes so I think I'm gonna take my dive into their stock. At some point I'd like to try the NOS line of Mullards but my wallet will do with current productions.
Welp. This Philco sounds amazing.
-VERY tight, controlled and mid-centric.
-Unoffensive, crisp highs.
Synergy with the PHIII and HD600s for sure, in my humble opinion. This is the first I've heard my 600s sound like loudspeakers!
Bought EH 12bh7 for my Sunrise and I love it. Perfect match for my 6XX. It trades off some the tubey roundness of my NOS stock (GE, Sylvania, Tung Sol) for lower noise and better linearity. It's clearer mids and high frequencies are balanced out by the 6XX. Makes electric guitar nice and crunchy, drums have improved attack and dynamics. Great for listening to rock (which is mostly what I listen to anyway). I love that I can swap tubes and have a completely different sounding amp.