Probably they will now not sound as nice anymoreHere is a quick and dirty IMD 19+20kHz measurement of the monoblocks shipping out to JA (Stereophile) on Wednesday.

Probably they will now not sound as nice anymoreHere is a quick and dirty IMD 19+20kHz measurement of the monoblocks shipping out to JA (Stereophile) on Wednesday.
The difference seems to be in "," vs. "." when giving listening distance input. You may very well be right in using "." As a European, I'm used to use "," in such cases.Are you sure about that - in crowns calculator I've found and plugged in those figures, you need 2x80W (the calculator seems to have no inputs for room gain or two speakers, so I've subtracted 3dB for each from the headroom to compensate)
But now perhaps your speakers only have 85dB sensitivity - so you need 2x160W. And if your listening distance is actually 3m (only 50cm further) - now you need 225W
Finally, what happens if every now and then when the family is out and you like to really crank it to 95dB - now you are looking at 2250W.
And we haven't had to go to anything insane for that. Individual cases need to be considered individually.
View attachment 419211
..it's very individual.but in home hifi needs ....
Load? Power?Here is a quick and dirty IMD 19+20kHz measurement of the monoblocks shipping out to JA (Stereophile) on Wednesday.
Image says 50W,8 Ohm.Load? Power?
So does this one. Hence my later post.This individual just happens to think that 95 dB average is insanely loud
Well, an average of 95 dB A-weighted is indeed quite loud in my opinion. On a linear scale, this would require peak levels of at least 115 dB in the bass. At a listening distance of 2.5 meters, most speakers would likely struggle to achieve this unless they are large towers with substantial bass drivers.The difference seems to be in "," vs. "." when giving listening distance input. You may very well be right in using "." As a European, I'm used to use "," in such cases.
Anyway, setting listening distance to 2 meters (which is actually roughly my current listening distance) brings the calculated power to 50W.
As I mentioned in my post, I am well aware that the power needs increase sharply with distance, required SPL etc..., but I don't see why anybody would want to use very low sensitivity speakers if high SPL and distance are required. Also, I absolutely agree that the cases need to be considered individually. This individual just happens to think that 95 dB average is insanely loud![]()
Appreciate the plot submission ... so it the IMD -94dB for the given test conditions? Are you able to post a 5W plot, so that we can compare with what Amir measures?Here is a quick and dirty IMD 19+20kHz measurement of the monoblocks shipping out to JA (Stereophile) on Wednesday.
Want to emphasize "quick and dirty" again. Will be following up with a more dialed in IMD and power sweep measurements after tweaking our rig a little more. Can at least confirm the amps do not shut down at half power....for instance 4ohms reaches over 700w under 1% as expected.
Quick point was just to show that, yes, the original review unit had a defective module.
Yes,measuring conditions and equipment must be stated,no one would judge a single image like the above.Is just a hint.Want to emphasize "quick and dirty" again. Will be following up with a more dialed in IMD and power sweep measurements after tweaking our rig a little more. Can at least confirm the amps do not shut down at half power....for instance 4ohms reaches over 700w under 1% as expected.
Quick point was just to show that, yes, the original review unit had a defective module.
Reminds me of this YT.I can do it for you, if you do not mind. Dvorak, From the New World symphony, movement 2.
It is impossible to generalize about peak to average ratio in music, It depends, strongly depends on what you listen to. Same applies to sufficient amplifier power.
View attachment 419120
... the hammer
Reminds me of this YT.
Classical music is wild, poor player next to the hammer
supply.
Lastly, the 9040BA has a rated 4.5uV noise floor and a 14.4dB gain. A buffer's output noise scales with its gain, so to get the typical 26dB total gain, like analog amplifiers, the buffers gain stage will gain up its output noise by 12dB, not including the voltage and current noise contribution of its gain resistors and the opamp itself, etc
.
I don't think the 20dB gain for XLRs is rather universal. A quick perusal of various Purifi amps from various vendors shows gains from 20dB to 29dB. The lower the gain, the better the measured SNR specs become. So there's ample opportunity for vendors to play "My SNR is better the yours" games. They rarely list the gains these SNRs were measured at.I think most of the use cases with symmetrical connection call for 20dB gains. Allows for optimal S/N through the full chain.
I have 9040/Weiss monoblocks, at 20dB, with rest of amps for MCH at 19dB. Difference to previous 27dB gain NCORE setup is quite substantial.
but I cam agree, that all not DClass amps are created equal. You cam still screw even the best module.