I don't want to beat a dead horse but I'm bugged.

@russ69 

 

Those are peaks.

Yes, that is db down, it gets better from there.

It appears it does not get better from there.

But if you happy with it it does not matter. I would be surprised if this was not audible in some manor.

 

Returning to the V3's performance at the loudspeaker outputs, channel separation (not shown) was the same as before, at 60dB in both directions below 1kHz and around 40dB at the top of the audioband. The V3's unweighted signal/noise ratio in the audioband, taken with the line input shorted but the volume control at its maximum, was also the same at 67.7dB left and 66.1dB right, both ref. 2.83V into 8 ohms. This was primarily due to full-wave–rectified, supply-related spuriae (fig.2), though the random noise floor components were also relatively high in level.

 

This was primarily due to full-wave–rectified, supply-related spuriae .

In other words, peaks or spikes that make the measurement seem worse than it is. In this case low frequency spuriae due to class D design. No reviewer, and I must have read a dozen reviews heard any issues in the lower frequencies, nor do I. We can go all night on this. Do you own or have you heard the Sphinx V3? No mater, either has Amir.

In this case low frequency spuriae due to class D design.

 

Can you explain what class D has to do with low frequency spurs?

I don't think anything can make it worse than -66.1db. That seems pretty bad. I did a search on Sphinx. Several users noting noise issues. I did not find anything on the V3.

Always let your ears guide you!

JD

I don't think anything can make it worse than -66.1db.

Not sure you are interested but the spuriae (peaks at certain frequencies) make the average number look worse than it is. You are just looking at the raw number and that isn't telling the whole story.

Several users noting noise issues

Links please.