Audiosciencereview.com's measurements are a little complicated so no offense, but one needs to read them more carefully and quick browse may not reveal the overall pictures.
The X3500H did not have the same shutdowns issue he spoke of other units such as the RX-A1080 in the pre-out measurements.
He did talk about the unit would shutdown and that it was not designed for continuous duty operation but he did not spell out the conditions in details. Suffice to say, one should not be surprised that multi channel AVRs are not designed for continuous operation at high levels of output. Actual music and movie contents typically would not require a 7.1 AVR to output any more than 10-20 W average in a small/medium sized room sitting 8 to 13 ft or so.
X3500H - He said:
"
The default output at full volume was quite a bit higher and clearly clipping. So I lowered that to
2 volt but unfortunately performance was still lousy as you see. SINAD is dominated by harmonic distortion and not noise. Clearly the output is beyond its comfort factor (shown later). For now, the ranking is poor:"
By poor, noted that he referred to THD+N of:
This is a review and detailed measurements of the Denon AVR-X3500H Home Theater Audio Video Receiver (AVR). It is kindly loaned to me by a member. The AVR-X3500H is a 2018 model but it is still available from Amazon for US $599 despite having a retail price of US $999. If it performs, this is...
www.audiosciencereview.com
AVR-X3500H:
SINAD - 73.645/73.317 dB, that is:
THD+N - 0.020784%/0.021585%
and by "default output at full volume.." he likely meant 4 V!!
Now look at the
T758 V3, also measured at approx. 2 V:
SINAD - 52.533/52.556 dB, that is:
THD+N - 0.236246%/0.235607%
With pre-out voltage at approx. 2 V, for amps with 29 dB gain such as the NAD and the Denon, the power amp output would have been approx. a whopping 400 W!!
Now consider the Denonn AVR-X3500H's THD+N of approx. 0.02%, we might debate whether that is even audible, the fact is, I am sure you will agree with me that anyone using such lower mid range AVR will most likely not push the unit pre-out anywhere near 2 V, except may be for a very short time during some rare transient peaks in movies.
On the other hand, people with exceptional hearing should be able to notice the NAD's almost 0.24% THD+N, if pushed the same way.
Soundandvision.com measured the X3400H that is practically the same in audio specs, as well as the NAD T758 V3. Their results were consistent with Audiosciencerevew.com's.
The reviewers of S&V, Audiosciencereview.com, Audioholic.com all have the subjective views, but if we compared the measurements than we can at least be on the objective side of the equation.
Test Bench Two channels driven continuously into 8-ohm loads: 0.1% distortion at 100.6 watts 1% distortion at 113.6 watts Five channels driven continuously into 8-ohm loads: 0.1% distortion at 86.0 watts 1% distortion at 95.3 watts Seven channels driven continuously into 8-ohm loads: 0.1%...
www.soundandvision.com
Please not that a around 110 W, just about the rated output of the NAD, the THD+N was at approx. 0.2%
At around 105 W, the rated output of the AVR-X3400H, the THD+N was about 0.013%, quite consistent with Audiosciencereview.com's.
View attachment 32601
Test Bench Two channels driven continuously into 8-ohm loads: 0.1% distortion at 123.0 watts 1% distortion at 147.6 watts Five channels driven continuously into 8-ohm loads: 0.1% distortion at 97.6 watts 1% distortion at 106.1 watts Seven channels driven continuously into 8-ohm loads: 0.1%...
www.soundandvision.com
View attachment 32602