Help with measurement data

[TjindarSingh]

Hi I'm not that good to read measurement data and wondering how this amp behave, they mention snr a weighted don't know what a weighted means please help.

Hegel H390 Integrated Amplifier/Network DAC Lab Report

Lab Report Its quartet of substantial feet lift the H390 sufficiently off the deck that the meatiest of audiophile hands can still reach the on/off rocker switch located beneath. Discount those pins and the H390 is uncommonly svelte for what is a hugely capable design. In practice, it delivers...

www.hifinews.com

I know the amp is really expensive but let's just discussing the measurement.

 

[staticV3]

they mention snr a weighted don't know what a weighted means please help.

A-weighting - Wikipedia

en.m.wikipedia.org

If you apply A-weighting to measurements like SNR or THD+N, then the numbers will always be better than without weighting.

 

[okok]

If you apply A-weighting to measurements like SNR or THD+N, then the numbers will always be better than without weighting.

no, not always, when you set to 90k BW the results can be well...

 

[TjindarSingh]

A-weighting - Wikipedia

en.m.wikipedia.org

If you apply A-weighting to measurements like SNR or THD+N, then the numbers will always be better than without weighting.

Is amir's numbers a-wheighted?

 

[TjindarSingh]

no, not always, when you set to 90k BW the results can be well...

Ok is the measurement good ?

 

[staticV3]

Is amir's numbers a-wheighted?

No.

 

[TjindarSingh]

No.

How important is the measurement after a certain point? I've heard amps that I loved that doesn't have more than 83db according to the manufacturer and it sounded amazing " class a sugden ia-4".

 

[Killingbeans]

How important is the measurement after a certain point?

Listening Test

www.klippel.de

Online Audible Dynamic Range Sound Test

Measures the dynamic range of your audio system and listening room.

www.audiocheck.net

 

[Eetu]

Have a look at this list. 9 Hegel amps listed. Not great performance for the price.

As you said they're likely fine in audible terms, but still why pay that much since there are other nice looking amps out there with better performance and features. Perhaps the NAD M33 if you have 5k to spend.

 

[TjindarSingh]

Have a look at this list. 9 Hegel amps listed. Not great performance for the price.

As you said they're likely fine in audible terms, but still why pay that much since there are other nice looking amps out there with better performance and features. Perhaps the NAD M33 if you have 5k to spend.

Tried them switching in between and preferd the Hegel. Have other class d amps that probably measure better.

 

[Sokel]

No.

Are you sure?
What's dbr-A stands for?

 

[staticV3]

Are you sure?
What's dbr-A stands for?

That the dB scale is referenced to 1kHz DUT peak = 0dB.
See here: https://www.ap.com/technical-library/measuring-levels-in-dbμv/

 

[zermak]

Are you sure?
What's dbr-A stands for?

It should means relative to Amplitude. So that in the graph you have the highest signal on the 0 point and it makes the graph easier to read.

edit: @staticV3 was faster than me

 

[Sokel]

It should means relative to Amplitude. So that in the graph you have the highest signal on the 0 point and it makes the graph easier to read.

edit: @staticV3 was faster than me

I know that about dbr.
But what is the difference between the plain one and dbr-A?
Is it some Audio Presision reference as I understand by @staticV3 's post?

 

[staticV3]

I know that about dbr.
But what is the difference between the plain one and dbr-A?
Is it some Audio Presision reference as I understand by @staticV3 's post?

It's explained in the link I sent you.
On AP analyzers you have dBr-A and dBr-B.
Those are not fixed referenced, but two presets that you can configure to whatever you like.
So dBr (Preset A) and dBr (Preset B)

In any case, they have nothing to do with weighting. Just amplitude references

 

[TjindarSingh]

It also says 105.6 is that when you use the internal dac?