Originally Posted by satwilson
One other quick thought, just pulled the 75Rocket6N1P's and rolled the 75REF6N23Ps. I always listen after 3-4hrs warm up, with the 6N1P's usually at least 8-12hrs as they are on burn in. The 75HGS really sounding super bright after 1/2 hour, getting to their HG status after an hour minimum. Hope we can all wait 3-4hrs for eval with these tubes. I realize we all understand this phenomenon with the Russian tubes and the Lyr mosfets. I had decided the 6N1P's were brighter, but the 6N23P's are super bright until 3-4hrs warmup/lyr mosfet warmup. Just sayin....using my go to Metheny CD. RB, were you using the 6N1P in your DAC or Lyr?
Totally agree the Lyr sounds best when fully warm. I like 6-8 hrs warmup min. If I'm reviewing that night, I'll turn the Lyr on in the early morning. My intregrateds I leave on 24/7 - they sound best after 2 days warm up! Just as smooth as silk, rich full tone. Same goes for the Lyr. On the actual tube swap I give them 10min warmup before listening. I don't think the tubes need that much warmup, but the mosfet ss output sure do. I've never heard the HGs as bright, even when first plugged in. Always supremely musical. They will 'open up' over the course of a couple of days, and the bass will deepen and tighten. Almost a shorten burnin cycle, not as long as the 200 original, but still they do improve over time. Same goes for the '74 Reflektors and '75 Voskhods.
So tube rolling is fine for comparison purposes, but for serious listening time is needed. I do roll prs through my Lyr constantly as I recieve new tubes from overseas. So I have a really good ear when listening to coldish tubes. After doing this so often, for so long, with so many different tube prs I know right away the sound signature. Recently rolled the '74 6n1ps, then '75 VR 6n23p SWGP '73 Voskhod SWGP, '74 6n23p Reflektors, '75 VR 6n23p plate posts. All reviewed with same song (Lorde Tennis Court). The 6n23ps never had the etch of 6n1p. Especially, that sizzily part near the beginning. The bass on the track is very deep and defined. The recorded ambience is amazing. It has a very wide range of high and low end notes, complex passages followed/proceeded by sole percussion strikes and vocals. I love Pat's Unity band (thanks for the recommendation!), but the range is fairly narrow in comparison.
Now my source is the Apl DAC a very smooth tubed dac. I did upgrade my interconnects recently to the silver wired, tube powered shield Audio Thrills with teflon plugs. Kind of expensive at $800 but very transparent, detailed, with an incredible sound stage. This cable system took the realism quotient up a big notch. Very quick and lively! What micro dynamics! Guitar string plucks are amazingly real! On my bigger Maggie system just jaw dropping!
They are not as forgiving as the Supra Swords, but with some tube rolling in the tube powered shielding supply adding back in tonal warmth and richness (Mulllard 12au7). Thru the Lyr/hd800/Moon Black Dragon v2, almost Stax level transparency, speed, and resolution. With the HGs...goose bumps...
Interconnects has this same 'settling in' issue as tubes. It takes at least a couple of days for a cable to sound best . This is after 200+ hrs of breakin. So 'settle' in is different to break in. I believe it has to do with the conduction channels that open between the metals of the cable terminals and input rca terminals. Same goes for the tube pins and the tube socket. These conduction channels allow the electrons to flow, I believe over time these passages 'open up' or the metalic crystalline lattice alters a bit to better allow electron flow. This is why I always use a little DeOxit Gold before inserting new tubes. It acts as a conduction enhancer.
Edit: Added further explaination for better clarityEdited by rb2013 - 8/31/14 at 7:12am