Does Op-amp Rolling Work?

[T&T]

I have used frequency expectrum app which record highest frequency levels, and using same music with different opamps, with opamps that I don't like usually don't make any peak pass 10k and with the one I like it make peaks at 13k 14k 15k

 

[RickS]

Audio's favorite village |d|ot predictably and shamelessly chimes in.

Along with texture, he now adds harmonic structure and richness to his list of huckster superlatives. The only aspect of these I want to hear is from the recording and not from my electronics.

 

[Jimbob54]

*MOD NOTICE*
Reminder to all members - please dont just drop Youtube links

See https://www.audiosciencereview.com/...“external-youtube-video-link-dropping”.60027/

Thanks

 

[oleg87]

I have used frequency expectrum app which record highest frequency levels, and using same music with different opamps, with opamps that I don't like usually don't make any peak pass 10k and with the one I like it make peaks at 13k 14k 15k

Huh? What are you using that op-amp for?
If there's frequency peaking that sounds like an op-amp that's very marginally stable at best.

 

[notinuse]

Ch1 blue and Ch2 red is the default. So 5532 blue, Sonic Imagery red.

But won't the blue sound cooler and the red sound warmer?

Sorry.

 

[Salt]

But won't the blue sound cooler and the red sound warmer?

Sorry.

The blue provides a more liquid sound, while the red is more emotional

 

[Geert]

Along with texture, he now adds harmonic structure and richness to his list of huckster superlatives. The only aspect of these I want to hear is from the recording and not from my electronics.

To avoid polluting this topic, update on the validity of Danny's test in the opamp swapping master thread https://audiosciencereview.com/foru...any-confused-master-thread.61010/post-2256982

 

[taner]

A current output DAC's I/V stage would be the most reliable way to test OP-AMP rolling. Otherwise it doesn't really matter at all.

 

[Cbdb2]

If you send a 1K Hz to the opamp with THDN of 0.001 or better and then to the power stage with THD of 0.03 you will get final THD of 0.03 or worse. I also disagree that swapping opamps is pointless. Yes, there is plenty of the IC and discrete opamps that perform worse then NE5532. There are some that perform better. Some people can hear the difference, some can't.

Sure, unstable opamps are audibly different from stable ones.

 

[Cbdb2]

This may have to do with different slew rates.

Zero.

 

[Cbdb2]

I am sure some will disagree. It is good to have options. Yes, NCX500 OEM opamp sounds and measures very good. But they allow bypassing it for a reason.

To sell them to audiophools.

 

[anphex]

Heh, jokes on you Amir.
EVERYONE knows that once you DIY something on your own gear, it MUST be an improvement!

/s

 

[RickS]

To avoid polluting this topic, update on the validity of Danny's test in the opamp swapping master thread https://audiosciencereview.com/foru...any-confused-master-thread.61010/post-2256982

Apparently the main polluting is coming from GR. Thanks!

 

[Cbdb2]

Ok, lets look at it this way..
You have two bullets that have the same mass and are fired at the same velocity. So they have the same trajectory and will hit roughly in the same space on the target.
You would argue that because the ballistics are the same that there's no difference or advantage to buying the more expensive critical defense round.

After all your measurements are the same, which you verified w your testing....

A bad analogy. You measure what your interested in. In this case you would measure the damage done to the target.

 

[Cbdb2]

I'll buy better wire than lamp cord

Better how?

 

[Cbdb2]

Well, no one's saying op-amps are interchangeable, there's a reason companies make a gazillion different models, and they should be selected to work well for the particular application. Since Bruno knows of what he speaks on this topic, I have to assume he made that comment for a reason that's grounded in engineering reality as opposed to the usual process of sticking random parts in dip sockets (or hanging them off tangles of wire) and hoping for the best.

(Though whether that engineering reality means audibly meaningful performance differences might be a different question, though of course there's no harm in having plenty of performance margin)

When your designing amplifiers to give .0000x% distortion an opamp will make a difference. Do you think you can hear the difference between .0000x and .000x % distortion? I bet Bruno would admit theres no audible differance.

 

[Cbdb2]

The universe is expanding, so the soundstage is expanding...

I moved 1 foot closer to my speakers and the soundstage width increased like magic. Even my wife commented from the kitchen, she told me to turn it down.

 

[BDWoody]

I moved 1 foot closer to my speakers and the soundstage width increased like magic. Even my wife commented from the kitchen, she told me to turn it down.

Clearly, for the next test it needs to be much louder, so you can't be disturbed by extraneous noises.

 

[quocheiser]

Can someone kindly explain how the graphs here https://atm-audio.com/input-buffer-for-hypex-nc500-and-purifi-audio/ relate to Amir's results?

 

[Heinrich]

A bad analogy. You measure what your interested in. In this case you would measure the damage done to the target.

An analogy is always bad, because it only tells that you are not able to lay out a general description of a rule. The latter is necessary for analysing its merits. Analogy => anecdote => to the bin.

One might argue that the measurements don't reflect the human hearing, and that it totally sane. But, if from measurements the possible deviation from ideal is orders of magnitude below any masking, even from a person's own blood circulation around the ears, what about that?

Then the stronghold of the 'subjectivist', which is fine with me as an attitude, becomes hilarious. Of course people don't see that for themselves. To insist that a technology, used for enertainment only, wasn't perfect is a bitter approach to the world. Let them go where their fun is.