GordonFreeman
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- Mar 20, 2008
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Thanks, the Cyber 20 looks interesting.
Originally Posted by Cool_Torpedo /img/forum/go_quote.gif ... Knowing a bit the D5000 I'd recommend better a good SS than a tubes one, but by no means I'm suggesting SS is "the way to go", just that you're more likely to find a good match and not falling short of power with "decent" SS than with "decent" tube amps... |
Originally Posted by Cool_Torpedo /img/forum/go_quote.gif That I have used none. My opinions about SET amps are based on my experience with them feeding loudspeakers. Most of the claimed SET HP amps are actually OTL designs (like the Earmax, MicroZotl, etc), and again for my experience using OTL with speakers, they're not quite the same thing, though they have an edge over conventional OT push-pull amps. I'm not sure if the Antique Sound Labs OTL mkIII in its high impedance output gets rid of the OTL circuit and uses an output transformer preserving the SET topology. Other likely SET HP amp would be the Cary Audio 300SEI, it's a SET integrated with a HP output which should preserve the SET topology, but I'm not sure about it, maybe other members are more familiar with it. The only SET HP amp I'm completely sure is SET and uses output transformers is the Opera Audio Consonance Cyber20. It's very likely there are more chinese made headamps using similar approach. If any serious tube amp maker released a HP SET amp I'd be willing to try it. Being a SET for its own sake is warranty of nothing, but if it delivered that special and unique texture of SET speaker amps, it'd be very worth investigating. Were you aware of more pure SET, not OTL, headphone amps, please share with me. Rgrds |
Originally Posted by Cool_Torpedo /img/forum/go_quote.gif If any serious tube amp maker released a HP SET amp I'd be willing to try it. Being a SET for its own sake is warranty of nothing, but if it delivered that special and unique texture of SET speaker amps, it'd be very worth investigating. Were you aware of more pure SET, not OTL, headphone amps, please share with me. |
Originally Posted by Cool_Torpedo /img/forum/go_quote.gif There are several ways to design the output of a SET amp. OTL can be handled by a coupling capacitor or using more tubes to lower the high source impedance of the output tube. Since speakers have much lower impedances than cans, the coupling cap solution is never used -AFAIK- on speaker amps and they use several chained tubes to get a low output impedance, matching the speakers one. |
It's all a matter of personal preference. My impression, based on my own experience and which of course is biased and not necessarily matching any of yours, is that a properly made output trannie can be as transparent to sound as no trannie, but regarding caps... well, you can use V-Caps TFTF, the most transparent ones I know of (my tube amp uses them), but still have their own sound signature and are very expensive. |
That's why in my post I said "when a serious manufacturer..." My hope is that someone doing a SET amp for cans using really good trannies, can get the same type of balanced, pure and properly textured sound of SETs as I know them used with speakers. Of course speakers that can be used with 9-15 wpc, otherwise it's a moronity to be speaking of SET amps with them. |
As I said, OTL SETs have an edge over push-pull designs, but they're "not yet there" IMHO. |
They do nothing substantially better than a properly made SS amp, and have power delivery limitations, due to the fact of needing a coupling cap or auxiliar circuit to match output tube's impedance to can's impedance. |
This makes them to be only at their maximum power output in a very narrow impedance range. |
Originally Posted by Cool_Torpedo /img/forum/go_quote.gif Maybe you're right and I need to listen to a really good OTL-SET amp for headphones, but I'd only do if: - The number of tubes to tweak and fine-tune is sensible, not more than three. - It can handle decently low impedance-low sensivity cans like the Denons or K701. - Its sound is really neutral. No boomy or utra lean bass, no highs roll-off, no thumpy midbass, not edulcorated midrange... I don't want the amp to colour the sound, I want it to have great voltage swing and to provide the clean, natural and "make-up" free sound that good SET amps can deliver. I'd say that I'd skip chinese amps, or too edulcorated or too unrefined. Any suggestions? Rgrds |
Originally Posted by nikongod /img/forum/go_quote.gif i will freely admit to being biased towards the singlepower amps, i have never heard one i did not like the "sound and tonality" of. the extreme is more powerfull than the MPX3 although the MPX3 will probably work out very well. both use 3 tubes. some of the Chinese amps can do well if you are willing to mod them. from what i have read, the darkvoice amps do very very nicely with a couple mods, and quite well out of the box. i would definitely try go to a meet. the last few European meets make me wish i had the money to fly over for the weekend |