Wow, here we go!
That's the real audiophile reasoning. The worse, the better. That's why the best engineereing solution (= exact signal copy, no interference added) would never win compared to signal degradation circuit.
Makes sense if you listen to mostly 'audiophile' recordings - IME, these are very bare-boned, they're crying out for added 'texture', to make up for their somewhat sterile presentation. Exactly the sort of material where a little bit of distortion goes a loooong way, perhaps ...
By way of an example, I have some Caro Mitas recordings (SACD) of Pratum Integram using B&K mics and custom electronics. These recordings are pristine and I just dont see that they are sterile, or need any added ingredients. I have quite a few other very good recordings - no extra sauce needed IMV. I'm using an Oppo BDP103 - which was a big step up from my Marantz (old player from 1998 low end) Pioneer and Sony CD players.
Factors affecting input stage RFI Rectification Sensitivity:
http://www.analog.com/static/imported-files/tutorials/MT-096.pdf
George
http://www.analog.com/static/imported-files/tutorials/MT-096.pdf
George
I also have some very 'organic' recordings - one of them is Paul Simons 'Rythm of the Saints' and some of Ry Cooder's recordings - very good to my ear. There are sterile recordings - Fourplay can fall into that and Gordin Goodwin recordings sound just too perfect. But, adding something on top of that isnt going to help IMV - they are just plain overcooked!
Interesting read. Only problem to also consider is the noise penalty with resistors, which complicates the problem in audio IMV.
Ok, looking forward to that.
IME, fitting a ferrite power cable clip-on filter, to a line level interconnect adds a low level nasty distortion.
Yes, a layer of dirt is removed, and there is improved clarity.
However, this perceived clarity may be partly due to higher order distortion harmonics.
Extended listening with these ferrites fitted ultimately drives me out of the room.
Different ferrite formulations may differ, and their distortions would be interesting to quantise.
Dan.
Looks like this will be an interesting investigation.
Nice one for someone to write up in Jan Diddens publication!
Nice one for someone to write up in Jan Diddens publication!
Yes George, AD have long time ago explored and defined susceptibility of input stages (bjt x JFET) to RFI. I will never admit that RFI makes 'better sound'.
Some manufacturers of opamps define EMIRR nowadays.
Some manufacturers of opamps define EMIRR nowadays.
Quick question.
Typical amplifiers have a capacitor in the shunt arm of the NFB signal attenuator.
This cap is typically a standard polarised electro.
Has anybody substituted a Bipolar (NP) electrolytic cap in this circuit position and measured differences ?.
Dan.
PS - Are NP and Bipolar correctly interchangeable terms ?.
Typical amplifiers have a capacitor in the shunt arm of the NFB signal attenuator.
This cap is typically a standard polarised electro.
Has anybody substituted a Bipolar (NP) electrolytic cap in this circuit position and measured differences ?.
Dan.
PS - Are NP and Bipolar correctly interchangeable terms ?.
If you check the datasheet, IIRC the LME circuits used an NP cap there at least sometimes. In one case it looked a 100uF film cap at first😱.
That's what I said. Case in point the wooden blocks, tried it heard nothing and eventually either my components were not up to it or it was the wrong wood.
As I remember there was a tightly knit posse at Ayre that heard just about anything "within minutes of walking into the room". Isn't Boulder in almost the same place? I'd love to see the two posse's get together, you know, for a little of the no peeking. This will never happen, and if it did it would end up a non-commital draw with smiles all around.
They both make what appears to be good products for sure.
Thanks, ok so somebody there knew something,.....perhaps ?.
My question was more regarding typical mid-fi stuff.
I have read the argument that the NFB voltage will never be sufficient to cause reverse breakdown/leakage of the NFB shunt cap.
Dan.
Doug Self #8 Capacitor Distortion - on his list for decades, with measurements
Distortion In Power Amplifiers
Cyril Bateman "Capacitor Sound" articles in Electronics/Wireless World when it still had valuable content
Capacitor Sounds, Speaker Cables and Crossover Inductors. Archive.org retrieval - not active
Distortion In Power Amplifiers
Cyril Bateman "Capacitor Sound" articles in Electronics/Wireless World when it still had valuable content
Capacitor Sounds, Speaker Cables and Crossover Inductors. Archive.org retrieval - not active
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Understand the need and purpose of the grid stop resistor how big do they need to be based on what ?
magic sells better than science
Agreed the block thing may have an effect if say the carpet is wool and humidity is low generating a static electric field . How different wood would effect the sound is maybe the moisture content and natural oil but that is a very long leap that Kierkegaard would have said WTF. Placebo work for some.
I'm talking of audiophile in the sense that they are marketed as such, the label has made a fetish of it. Some peculiarities of the few I have - all 2nd hand, bought el cheapo - is the treble being heavily butchered, and the bass pumped up - a classical CD has remarkably anaemic violins, every ounce of zest has been excised, perhaps from fear the listener will be offended by shrieking tones ...
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