I didn't have much time before to roll tubes in H but in the last few days I kind of did my fair share of exploration primarily in the double triode position and a few rectifiers while constant was a quad of KT170. I tried el156 before and they are great but from "moral" reasons I don't want to use them and same goes for Siemens f2a.
To sum up I tried: NOS 6n1p, Philco 6sn7, TungSol 6sn7GT round plates, TungSol VT99 round plates, Mullard ECC32, Thompson 5687, Siemens e182cc. From new production only Psvane CV181 Black Treasure was in the rotation. Rectifiers i tried so far - Taka 274b, Hytron 5u4g and RCA 5u4g both with top getters, Pope 80, RCA 80 Globe, EML 274b. Didn't try heavy lifters like WE274B engraved base, GEC U52 and I'm not sure if I will as I extremely like what I hear now.
First of all what I need to say is that Horizon despite being ultimate tool for rolling nutheads is quite boring in this game as with any tube set I tried sounds fantastic. Even with on paper cheapest tubes basic threshold line is very high which in my experience with other Lampi DACs is not the case to this extent, so it may be easily said that this one is perfect DAC for non tube rollers. Plug/play and forget about it variant which is good.
Rectifiers wise I was using Taka for certain period and it does sound exceptionally good but for my system maybe a tad too dark and heavy which I don't need so I've sent it back to power supply of my Tobian SC12 where it rocks and instead I'm happily using my trusted RCA 5u4g. Hytron and Pope 80 also great but RCA is just more airy and punchy - not a lot but sufficient to stay.
Double triodes - for my liking and system Mullard ECC32 is the torch bearer - phenomenal dynamics, bass which moves your intestines with every drum kick, very detailed and airy at the same time and all of this wrapped with extreme musicality. Small step behind are TS 6sn7/TS VT99 & Thompson 5687 where I guess depending on the system someone will for sure prefer or choose one of those even maybe above ECC32. Step behind are Psvane CV181 and 6n1p which for the money they cost are actually price/performance winners in my book.
I'm certain there are other options to explore (actually I know that for a fact ) but for a time being I believe its time to settle down and enjoy the music.
To sum up I tried: NOS 6n1p, Philco 6sn7, TungSol 6sn7GT round plates, TungSol VT99 round plates, Mullard ECC32, Thompson 5687, Siemens e182cc. From new production only Psvane CV181 Black Treasure was in the rotation. Rectifiers i tried so far - Taka 274b, Hytron 5u4g and RCA 5u4g both with top getters, Pope 80, RCA 80 Globe, EML 274b. Didn't try heavy lifters like WE274B engraved base, GEC U52 and I'm not sure if I will as I extremely like what I hear now.
First of all what I need to say is that Horizon despite being ultimate tool for rolling nutheads is quite boring in this game as with any tube set I tried sounds fantastic. Even with on paper cheapest tubes basic threshold line is very high which in my experience with other Lampi DACs is not the case to this extent, so it may be easily said that this one is perfect DAC for non tube rollers. Plug/play and forget about it variant which is good.
Rectifiers wise I was using Taka for certain period and it does sound exceptionally good but for my system maybe a tad too dark and heavy which I don't need so I've sent it back to power supply of my Tobian SC12 where it rocks and instead I'm happily using my trusted RCA 5u4g. Hytron and Pope 80 also great but RCA is just more airy and punchy - not a lot but sufficient to stay.
Double triodes - for my liking and system Mullard ECC32 is the torch bearer - phenomenal dynamics, bass which moves your intestines with every drum kick, very detailed and airy at the same time and all of this wrapped with extreme musicality. Small step behind are TS 6sn7/TS VT99 & Thompson 5687 where I guess depending on the system someone will for sure prefer or choose one of those even maybe above ECC32. Step behind are Psvane CV181 and 6n1p which for the money they cost are actually price/performance winners in my book.
I'm certain there are other options to explore (actually I know that for a fact ) but for a time being I believe its time to settle down and enjoy the music.