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Good thread on diyaudio.com
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Posted on August 2, 2015 at 04:12:41 | ||
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Did so long ago, posted on August 2, 2015 at 07:47:27 | |
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Pretty funny guy Measurements of high order behavior found here. |
Calvin said it best..., posted on August 2, 2015 at 07:51:13 | |
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A huge benefit for... |
Bingo! Couldn't agree more....nt, posted on August 2, 2015 at 14:57:25 | |
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Nt |
You seem quite lucid , posted on August 2, 2015 at 16:01:25 | |
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for being 512 years old as your profile indicates. :) |
RE: You seem quite lucid , posted on August 2, 2015 at 16:08:04 | |
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That's what, posted on August 2, 2015 at 16:27:03 | |
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512 year old guys do, right? :) |
Are there any, posted on August 2, 2015 at 16:29:21 | |
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speaker companies that use the Putz amp to demonstrate their product at shows? |
Do your homework... Google Kaluga, veritas, astah, etc. nt, posted on August 2, 2015 at 16:43:49 | |
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Nt |
What I was looking for is, posted on August 2, 2015 at 17:45:08 | |
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something like this: Wilson and VTL Nola and Audio Research Usher and Pass Labs |
RE: +1 nt, posted on August 3, 2015 at 01:40:42 | |
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nt |
Yeah, posted on August 3, 2015 at 05:58:21 | |
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I found the same also to be true of the Halcro amp as you observed. Clearly, Putzeys like Candy is committed to using high levels: "And if you get to very large amounts of feedback, the result is just supersmooth. So that is why I say that it is normal for an experimenter to experience that if you take a good-sounding zero-feedback amplifier and add 6dB of feedback, the result sounds worse. They heard that right. But had they been in a position to add 60dB, well then, suddenly they would have been confronted with a sound that is little short of magical." 60 db of correction? Otay! Soundstage! interview |
RE: negative feedback , Static and low self esteem , posted on August 3, 2015 at 06:19:13 | |
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Anyway , which amp manufacturer uses soundlab speakers to demonstrate their wares? There are few companies I suspect largely because of size and cost. The amplifiers that are happy driving reactive loads are relatively few. Ralph Karsten has used them with his amplifiers before as did Ray Kimber when he wanted to showcase his Isomike recordings. He used six and quad pair versions for years at RMAF and at CES using Pass Labs amplification, a natural match. Early Threshold amps were frequently used with Dayton-Wright electrostats in the 70s. |
RE: Judgement call, posted on August 3, 2015 at 10:04:58 | |
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10-15dB is a bit less than Nelson Pass uses in his designs. |
Some local, yes, posted on August 3, 2015 at 11:46:06 | |
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No global feedback is used. |
You got me, posted on August 3, 2015 at 13:54:18 | |
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I'm telling you what I hear. |
Comparative numbers, posted on August 3, 2015 at 14:15:40 | |
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The MC450 reports a DF of 400 which falls into the moderate camp in terms of SS amps. By comparison, the Mola Mola Kaluga's is 4,000 and the Crown Studio Reference is a whopping 40,000! |
RE: Sorry, no one is selling ..., posted on August 3, 2015 at 14:40:38 | |
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Are you Buying something .... ? |
RE: And yet Halcro , posted on August 3, 2015 at 14:57:50 | |
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... if you look at Halcro bench measuremts there are issues Interesting. That's certainly not John Atkinson's opinion: "As I have come to expect from Bruce Candy designs, the dm88 offers superb measured performance." What do you find problematic? Here's the data. |
RE: Good thread on diyaudio.com, posted on August 3, 2015 at 14:58:12 | |
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Arm chair geniuses. :-) |
We will look forward to your, posted on August 3, 2015 at 15:09:41 | |
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providing some substance. |
Do ask him , posted on August 3, 2015 at 17:52:16 | |
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about his "glossing over obvious issues" with the Halcro measurements. |
RE: Do ask him , posted on August 4, 2015 at 02:10:27 | |
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Not that impressive... |
You haven't a clue as to what Bruno Putzeys is doing with his amp designs...nt, posted on August 4, 2015 at 03:37:06 | |
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nt |
I'm having trouble locating this reference, posted on August 4, 2015 at 06:13:24 | |
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would you care to cite this assertion? What I find in the 1956 High Fidelity Circuit Design seems to suggest the contrary: "Another feature detracting from the advantages of overall feedback is its effect on output hiss and other noises generated in all high gain amplifiers...All these disadvantages of overall feedback can be overcome by restricting the number of amplifier stages over which feedback is applied....Applying inverse feedback from the output over not more than two stages-and preferably only as far back as the driver stage-will prevent instability troubles with changes in the output load." |