op amp and cap questions

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I will post as I test, there will be tests...😀
Roland's 'Stritch' seems to sound more 'right'. All the horns I hear do so far...
Blue Notes are Killer.. I hear more echoes with zero processing, studio they made it in?
Consumer electronics are highway robbery considering these improvements the cost of which could simply be added to the price-tag without any real drop in sales, I would think..
I would guess,
(based upon my novice damaged ears, and the talk I read here about 'swing' and 'headroom'),
that the original op amp was clipping/otherwise distorting at certain frequencies, hence the harshness...
switching the ne5532 out for a $5 part was definitely a good move!


p
 
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There will be tests 🙂 that's good.

The only "advice" I can offer such as it is, is to keep an open mind... it's only through extended listening sometimes that you realise that perhaps "yes this is better".
It's so easy to swap something, and be subconciously "sure" before you even listen that it will be better (or worse) so don't rush... perhaps come back again the next day and give it another go.
 
. it's only through extended listening sometimes that you realise that perhaps "yes this is better".
It's so easy to swap something, and be subconciously "sure" before you even listen that it will be better (or worse) so don't rush... perhaps come back again the next day and give it another go.

My sentiments exactly.
It will be a solid week before I try another in all likelihood...

I did the same swap in a CD player with the same result WOW 🙂
Then I swap the LM811 in the digital receiver with LM4562 and again I was happy with the result.

I'm going to open up the DVD (2nd gen panasonic) and see what it has too....

I looked in my bose wave radio(bought in an earlier more ignorant time:no:).
It has 074 quad op amps in it(2 that I found), and all same series Nichicon caps in it. I was pleasantly surprised, main board is elegant, it makes a nice CD player..
Even the transformer is exotic(by my experience).
 
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here is what I believe to be responsible for the audio in my dvd player, explains why it sounds so good...
IMG_0085.jpg
 
fooling around with $5 op-amps...

I have put an opa into the tripath, and can't make an intelligent comparison yet, after a couple times listening.
I am going to have to do back-to back same source-same media comparisons with this.
I see people describing opa's as "warm" or "tube-like".
I have never heard a 'nice' tube amp yet, (that's YET, I will build one eventually), so I can't say if it does or not.
The mids/lows 'seem' a bit 'softer' and more 'loud', if that makes any sense.... Is that what 'warmth' is?
Matter of individual perception I guess....

I know that a CPU wafer gets bombarded by certain IONs to form the semiconductor(s).
Are op-amps made the same way?
Or like this: "by forcing crystals of germanium or silicon to grow with impurities such as boron or phosphorus, the crystals gain entirely different electrical conductive properties. By sandwiching this material between two conductive plates (the emitter and the collector), a transistor is made."
Does the difference in sound from op amp to op amp have something to do with this process? Different IONs, different wafers?
Most intriguing.
 
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Well this is where subjectivity comes into it... it's the sound that you like, and it can be hard to describe. It's when it all comes together into something special, and you'll know when you hear it. For me it's a sound with no sense of edginess or harshness, inky black silences when needed, effortless sense of dynamic scale when the music calls for it. And for it to do that special "magic" on most material, not just a few selected recordings.

Couldn't in all honesty tell you much about the actual manufacturing processes and how they differ between devices as manufacturers have there own proprietry techniques, but the "sound" of particular opamps seems linked to the distortion spectrum they have.
 
K so far I have tested from MC Goldring Eroica cart/mmf 7 phono to C1 to Elec Xover to tripath. with side B of Blue Note "Somethin' Else" for about 3 hours...

4558 is not very detailed, and sounded mono-ish. Not bright at all.

5532 had better seperation and better detail, but was BRIGHT (like needles in my ear).

tl072 was the first noticable step toward great seperation, and it was maybe a little more detailed than 5532.

opa had best seperation, was a tad less accurate than the LM.

LM was described by someone here as 'analytical', no more needs to be said.
Seperation is at least as good as opa. My favorite thus-far..
 
I'd go along with those results 🙂
The TL072 can be surprisingly good when you "design for it" and use it properly.
The 4558 has no place in audio these days but it's a good reality check.
The OPA2604 is probably the most coloured sounding... and that's the one I like and use... but there's even more to it than that. It's how the whole audio chain comes together and performs that matters most and it does seem possible to use different devices to achieve a unique sound.
 
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