Thank you @atmasphere , skimmed the linearaudio link, will delve in later. Looks like it will not be that hard to follow.
In addition to what you write, is not the negative in negative feedback, simple because it is subtracted?
Can a Amp be "timeless" and compete with todays amps?
I’ve been into hi resolution audio for 20+ years, well longer than that but acquired high quality gear about that time. I veered off into other interests for 15 years but still had my system sitting idle in it’s dedicated room. I became interested in it again 6 months ago and began to update it. I still have my Rega Planar 25 table and a Dragon phono stage. I retained my CEC TL1 transport, but replaced my DAC with a Dinafrips Venus II, I also have the Hermes DDC which I feed my CEC into as well as my Cambridge Streamer. I sold my Genesis V speakers because they were having an issue with the left channel bass and since they were out of business I had no way to fix them, it was over my head. I found someone that wanted them and was willing to repair them himself. (he is very happy with them) I replaced them with some Goldenear Triton 1.r’s which I love. So here is the nostalgia part. I still have my VAC Cla 1 Mk II pre amp and my VAC Renaissance 70/70 Mk II amp. I feel they still hold up well sonically, so my thoughts are to send them both to VAC for the Mk III updates this fall of 2022, which includes replacing any necessary parts and "voicing" them back to new as intended when they were first made. I really believe these pieces are worthy of the restoration, are newer pieces today really going to make much headway? I cannot afford to replace these items with "like" items as I am retired and the discretionary income isn’t there anymore. I just feel like they are still really good and offer a very high quality sound. I mean 8- 300 B tubes can’t be all that bad can they? I’ve voiced the pre amp with with Telefunken 12AX7’s and I have a small stash of them. Tube sound is still great right?
Showing 5 responses by deludedaudiophile
No I meant in a much more simple fashion, i.e. a portion of the output is subtracted from the input. Literally negative. It would technically be out of phase but that is by definition. When @teo_audio writes positive feedback, does he really mean feed forward? |
Burn him at the stake!!!! I am really getting a kick out of this place. I was curious, so I tried a search. "Class D" and then found I could filter by user, so I filtered for atmasphere. It appears that atmasphere has been communicating about their class D amplifier for almost 5 years. It could be longer but I got bored of searching. I have worked in semiconductors and batteries. Everything new we release is better and better rendering even last years products effectively obsolete. I find this a strange thing to complain about. When I read atmasphere's other posts in this thread, I would be happy he does rely on measurements. He seems to have a handle on how those measurements will make his product sound. How can that not be a good thing? This is audio. I don't think accusing people of audiophile heresy is productive. |
It has become an interesting thread. Two people are talking about negative feedback. One clearly understands the topic and appears to be able to talk about it in great length. The other appears to talk at great length. It is up to the reader to decide who is correct. I enjoy both, but for different reasons. |
@williambf , your result would imply a difference in output resistance between the two models. Have you tried using different taps to see how you prefer the sound? I gleamed this from Stereophile, not sure they are your exact amplifiers.
This is 2012, may be similar.
This appears to be a 1994 review:
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