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  1. 2

    I am sick of failing amplifiers

    In fact, as I said, the amps were -12db from spec wrt to noise after Hovland's mods. -10db from where they were before his mods. They were quieter than some push-pull tube amps I've heard in my systems and quieter than most any other SET I've tried or others brought through here. When the amps...
  2. 2

    I am sick of failing amplifiers

    I'll restate as previously: I bought those amps as the original owner directly from Audion, then in the UK. I made no changes to them myself other than tubes. About four years in, one of the solid state rectifiers blew. I took both amps to Bob Hovland and asked him to replace and upgrade the...
  3. 2

    What features of Roon are worth the price? Compensate for Roon’s poorer sound quality?

    I have to ask what version of Roon you are running. Everything I googled about this says that when Roon did their recent total renovation update, you no longer get a choice. If it's there, I haven't found it. I'll go back to the mine. Phil
  4. 2

    What features of Roon are worth the price? Compensate for Roon’s poorer sound quality?

    Thank you for the tip. It's not what I'm seeing, and when I Google this trait, what I get back is that the current version of Roon gives you no option. I'll take your cue to look again. Apparently one of the drivers of this is Roon wanting to drive revenue to musicians by forcing Tidal playback...
  5. 2

    What features of Roon are worth the price? Compensate for Roon’s poorer sound quality?

    I am completing a four years project to rip 5500 CDs to a server, having taken the time to ensure bit-perfect rips. The rips have been done for over a year. The data editing is the time sink now, but I listen to this hard-earned convenience. I also have used Tidal HiFi for the past five years or...
  6. 2

    Keith's Dream Amplifier Thread

    I get it. PL 519. TV sweep tubes unchallenged by hifi. Julius Futterman thought the same way for his OTLs. Vacuum tubes chosen well for a circuit are incredibly durable despite the visual vulnerability of being glass enclosed. Example: In place of 5687 tubes I sometimes use 6900s. This tube...
  7. 2

    Tube DACs vs. Delta Sigma DACs vs Ladder DACs vs. Multibit DACs? Sonic Signatures readily evident for TOP Designs? Tubes give up Anything?

    Well, sure. I am not questioning your view of the Yggy in isolation. My only point is that context is influential. Knowing how you hear the Yggy I am confident that if you heard it in direct comparison to the Pagoda Balanced or Pagoda tubed as I described, you'd notice the same differences. The...
  8. 2

    Tube DACs vs. Delta Sigma DACs vs Ladder DACs vs. Multibit DACs? Sonic Signatures readily evident for TOP Designs? Tubes give up Anything?

    If one listens to the Yggy in isolation and out of context of hearing anything better, it sounds very credible and is on its own musically-convincing. It was in extended, side-by-side comparison with the Pagoda Balanced using 2C51 and later CCa tubes that the relative congestion and smearing of...
  9. 2

    Tube DACs vs. Delta Sigma DACs vs Ladder DACs vs. Multibit DACs? Sonic Signatures readily evident for TOP Designs? Tubes give up Anything?

    Maybe he's right. Who knows? There are few *practical* ways to get every boutique DAC contender in the same place at the same time to compare. There is an explosion of $1500 - $3000 DAC alternatives coming out of Asia. I haven't heard the Tubador; just know about it. At the heart of it, AD1865...
  10. 2

    Keith's Dream Amplifier Thread

    That's my experience too. For about 50 years, but really more. I've never been shut down for music access because of a tube failure. However it is decidedly not Keith's experience. So the outcome may very well not be tubes-fueled. Phil
  11. 2

    Keith's Dream Amplifier Thread

    Well, ultimately that's up to him. Right now Ampzilla has to be beaten, which it could be. He's moving to higher-efficiency / lower drivers-crossover-complexity speakers. This opens up viability for lower-power, more reliable tube amplifiers. So much remains to be settled in the reset. Keith is...
  12. 2

    Keith's Dream Amplifier Thread

    Keith has new speakers coming. We will reset a reference on amps as a result and then Keith will decide what motivates him. -Phil
  13. 2

    Tube DACs vs. Delta Sigma DACs vs Ladder DACs vs. Multibit DACs? Sonic Signatures readily evident for TOP Designs? Tubes give up Anything?

    For this matter of R2R vs. Delta Sigma or "math" DACs, there is more a dial than a switch. My experiences-informed preference lands on the R2R side of the fence. But The AKM chips, like the 4497, are admittedly unusually-organic-sounding delta-sigma chips. For example, the excellent m2tech Young...
  14. 2

    Atmas M-60 with ZU Druid VI

    Not my experience at all with Audion, so am not sure of any obvious explanation. They for me are uniquely fast and transparent sounding, but I didn't use stock tubes. I've gone head to head between Audion and Audio Note and I would not put them even in adjacent sounds; completely different. I...
  15. 2

    Atmas M-60 with ZU Druid VI

    There isn't an intrinsic OTL sound just as there isn't an intrinsic SET sound. Well-executed OTLs have a quick, agile, transparent sound, but so do some OPT amps and so do some SET. However, there is a vast difference between, for example, a Cary SET amp and one from Audion (and not in favor of...
  16. 2

    Atmas M-60 with ZU Druid VI

    Yes. Futterman OTLs (original), Transcendendent, and Atmasphere. Listened at length many times. I also owned Futterman OTLs for about 15 years much earlier, using them on double Rogers LS3/5a @ 30 ohms in one of my systems at the time and on ProAc EBS 30+ years ago. The OTLs are quite effective...
  17. 2

    Atmas M-60 with ZU Druid VI

    Sean's current plan if to configure the Definition 6 as switchable for either 4 ohms or 16 ohms amplifier load. -Phil
  18. 2

    KeithR's "Dream Speaker" Search

    Sean is projecting end of Q1/21. -Phil
  19. 2

    SET amp owners thread

    It's worth putting some effort into adjusting the floor-to-plinth gap on the Druid 6, to optimize the bass, and getting that done also has some more subtle effects on midrange and soundstaging, due to the driver-to-room acoustic impedance matching that the Griewe principle in Druids performs...
  20. 2

    I am sick of failing amplifiers

    Here are the facts, as I was the seller. Today, Audion Black Shadow base Level 5 cost $13,499 in the US. Base level 5 has silver wire in the audio path and copper wound transformers. Level 6 gets you silver secondaries in the OPTs. Further levels up get you more silver until at the top of the...
  21. 2

    To SUT or not to SUT?

    I was not suggesting that the SUT/MC cart generally delivers bass roll-off compared to all-active gain. I've never found that to be usual. The differences when they appear are more in the realm of bass qualitative character, and even then more a matter of differences where there will be a...
  22. 2

    To SUT or not to SUT?

    A 1:26 xformer connected to a 47kOhms input will show the cartridge a load of ~70 ohms. This shows you how even the cartridge maker acknowledges the difference between resistor loading and same by SUT, given that MSL's own resistor loading spec for the cartridge is ~500 ohms. Output from the SUT...
  23. 2

    To SUT or not to SUT?

    Normally I would more than tilt in favor of using an appropriate SUT into the MM inputs of your XP-25, with a MC cartridge. In the specific case of your My Sonic Gold, it's harder to make the case, though that doesn't mean an SUT won't sound different (and better), but the math doesn't lead to...
  24. 2

    Phono cable recommendations?

    Oh no, don't pay $5000 for a phono cable! Zu Event II. 90° 5-pin > WBT Next Gen Silver RCA @ 6' is $1224. You can config on their site (zuadio.com) from 39" to 15'. Most cables are effectively fixed-parametric equalizers and time domain compromisers, too often at blindingly fierce prices. The...
  25. 2

    KeithR's "Dream Speaker" Search

    The LTA preamp is supplied stock with a pair of hand-picked NOS 12sn7 dual triode tubes, and a pair of current-production Russian Gold Lion 12at7. The 12sn7 tubes in this case are United Electron grey glass. I will have to remember to get the letter codes to try to determine the actual origin of...
  26. 2

    Isolation Transformer and Balanced Power versus PS Audio Regenerator

    The main thing is, don't ever plug any lighting fixtures into your add-on, wall-plug-in balance power appliance. That's the primary out--of-code-for-domestic-use balanced power restriction. Phil
  27. 2

    Why are vibration isolation products still considered accessories?

    We agree any energy management strategy has sonic consequences. As I wrote previously I mitigate pure paths to mechanical ground with selective applications of isolation. Bearings are one. synthetic materials applied sparingly to the ground path are another. But generally my experience is it's...
  28. 2

    Why are vibration isolation products still considered accessories?

    I am not claiming that energy behaviors change. Just that the structure a system is in, and the system components affect priorities. The most obvious example is what I already cited in other words: If I use a turntable as a source in a system which is located in a house with an expansive...
  29. 2

    Why are vibration isolation products still considered accessories?

    I don't understand what you mean by the latter. In the former, with vinyl in the mix as the or a primary source, isolation becomes the technique of first resort in any structure type requiring a system owner to cope with footfalls and other disturbances. Since isolation negates mechanical...
  30. 2

    Why are vibration isolation products still considered accessories?

    I've done many years of experimenting with vibration and resonance control, early in old wood-frame houses on the US east coast, with suspended floors, and for the past 30 years in southern California single-story wood frame houses built on concrete slab foundations. The structural environment...

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