High-End Regulated Buffered Inverted GC

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#784
Peter Daniel said:
It's just that the implementation of the amp I've built recently is not up to the task.
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Right on spot.😀


analog_sa said:
Carlos, otoh, seems to have a preference for smoothness rather than dynamics or excitement. His fondness of the 627 and buffers also points in the same direction. So, possibly both opinions are correct in their respective contexts 🙂
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Oh no!!!:bawling:
I love dynamics.:bawling:
The OPA627, well implemented, has outrageous dynamics.
Sound is clear, smooth but very detailed, dynamic.
Treble is very good.
And yes, I don't like that kind of "digitalitis" I hear on some "technically-good-but-sounds-likes-s**t" op-amps like the NE5532.

OPA627 with prominent midband?:clown:
Peter, you need to make another amp, your amp is all upside down.:clown:
 
#788
carlosfm said:
The OPA627, well implemented, has outrageous dynamics.
Sound is clear, smooth but very detailed, dynamic.
Treble is very good.
Click to expand...

having build a few of those opas, I would agree that they are clear and detailed. the lm chips seem to be a little fuzzy at the high end.

in part due to the wrong orientation of my PSU transformers, 🙂
 
#789
carlosfm said:
... I hope I didn't make a mistake...
Take it as you want, believe, don't believe, but I must agree with Nuuk: someone must be deaf or something's wrong with the system or whatever if you listen to this and say it's not better than the typical Gaincard-copy-paste amps.
No need to A-B testing here.
It's clear as water.:angel:
Click to expand...

Is this the same Carlos? (was looking something else up):

"You're right, Raka.
Nothing better than an A/B test.
On an A/B test anyone can pick a difference.

__________________
I don't comment my schematic.
It was hard to make, it should be hard to understand.
------------------------------------------------------
Carlos Filipe.
 
#790
Peter Daniel said:
I will give a try to LT1084 regulators, but I'm almost sure that they are no match for battery power. And no more inverting circuits.
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As I've said to you before, see you in 2020!
You're the kind of guy that looks at the wrong place and instead of doing what it matters, does things in a wrong way and then tries all sorts of black magic and fancy components to sort the crap out.

I offer you a new PSU schematic.😎
 

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#791
Hi,

The OPA627, well implemented, has outrageous dynamics.
Click to expand...

Sorry, but I've never heard a semi-conductor buffer circuit of any kind that posesses such qualities all by itself.

Wouldn't that depend on the PS voltages it can work with?
I mean, to be outrageously dynamic it must be able to swing quite a bit, won't you say?

So, what would make the OP627 such a great performer in this respect compared to other buffers? Anyone knows?

Cheers, 😉
 
#792
I never liked the OPA627's, I tried them in various cdp's and found that they sounded muddy.
It wasn't untill I used them in the GC buffer and implemented them properly that they started to sing, I assure you they sound wonderful in my clone, infact I still think the bass is their biggest strength, I can't understand why Peters lack this tight deep bass
 
#793
jackinnj said:


Is this the same Carlos? (was looking something else up):

"You're right, Raka.
Nothing better than an A/B test.
On an A/B test anyone can pick a difference.

__________________
I don't comment my schematic.
It was hard to make, it should be hard to understand.
------------------------------------------------------
Carlos Filipe.
Click to expand...

Of course.
But in this case the difference is very obvious.
The unregulated amp driving my Epos speakers compared to this one seams like the difference between a portable CD and a serious one.😀
Don't tell me you would need to A-B this?
 
#794
t. said:
I never liked the OPA627's, I tried them in various cdp's and found that they sounded muddy.
It wasn't untill I used them in the GC buffer and implemented them properly that they started to sing, I assure you they sound wonderful in my clone, infact I still think the bass is their biggest strength, I can't understand why Peters lack this tight deep bass
Click to expand...

Maybe the Nichicons caps are to blame? I was never too excited about those😉

So are you saying now that the deep bass is more due to OPA627 presence than the regualted supply?
 
#795
carlosfm said:


Of course.
But in this case the difference is very obvious.
The unregulated amp driving my Epos speakers compared to this one seams like the difference between a portable CD and a serious one.😀
Don't tell me you would need to A-B this?
Click to expand...

I can very well conclude that there is something wrong with your system. I already know you are using 5m interconnects. How long are your speaker cables?😉
 
#796
Peter Daniel said:
So are you saying now that the deep bass is more due to OPA627 presence than the regualted supply?
Click to expand...

Both, actually.
Sometimes you loose yourself with fancy passive components...:dodgy:

Leon made a good job with the OPA627, and he is using exactly my schematic.
How can two guys look at my schematic and make such different sounding amps?:xeye:
Peter, there's too many variables here for you.:whazzat:
 
#797
carlosfm said:


As I've said to you before, see you in 2020!
You're the kind of guy that looks at the wrong place and instead of doing what it matters, does things in a wrong way and then tries all sorts of black magic and fancy components to sort the crap out.

I offer you a new PSU schematic.😎
Click to expand...

Geeeez Carlosfm,

I know you have the vendetta thing going and all, but why are you not capable of seeing that someone else’s approach, that they worked up over time, which you have not heard sounds better to them than their perception of yours?

I doubt Peter’s implementation of your approach sounds all that different from yours if the amp you built was put directly into his system. Perhaps it would. Perhaps it wouldn’t. So what?

You have an implementation you like with a set of speakers. Great. The technique can probably do some nice things in others systems. Great. Regulation has a good technical underpinning for overcoming some of the theoretical weaknesses of the gainclone classic.

Peter built a version of your amp approach and felt the results were not sufficient and wants to veer off and pursue finding an improved path for his needs, speakers etc. Sounds reasonable. Why the demagoguery?

What is the basis for your difficulty with the idea that other approaches can give similar or better results to your exact approach? Or that there are other paths that should be explored?

Of course others are mere mortals and don't have your self vaunted Epos speakers. Why in your mind this renders others incapable of having experiences and opinions other than yours is not clear to me.
 
#799
Peter Daniel said:


Maybe the Nichicons caps are to blame? I was never too excited about those😉


To be honest I don't like any of the audiograde Nichicon caps, I'm only using industrial grade Philips for the electrolytrics, the buffer did sound a bit laid back at first but after being given a good few hours to burn in it sounds great

So are you saying now that the deep bass is more due to OPA627 presence than the regualted supply?
Click to expand...

No, I put it down to both the regs and the buffer, the regs on their own clearly improved things, adding the buffer just made it even better


Peter Daniel said:


I can very well conclude that there is something wrong with your system. I already know you are using 5m interconnects. How long are your speaker cables?😉
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#800
moving_electron said:
I doubt Peter’s implementation of your approach sounds all that different from yours if the amp you built was put directly into his system. Perhaps it would. Perhaps it wouldn’t. So what?
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Peter is the only one that may have a weird system.
Or else, those wall speakers can't stand this sort of dynamics, the building shakes.:clown:

I repeat: the only one that tried this and had weird results is Peter.
All of us that tried and like it, we must be all crazy.:clown:

You know what?
I don't get payed for this, good night.
Sorry to open this thread, as you were all happy with a copy-paste Gaincard amp that you say it's Peter's.
He makes the best out of these chips, forget it.
More than 5 components is too much for him, anyway.:clown:
 
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