Where did you get this number?
All I found was this:
S/N Ratio (Line, IHF-A) | 98 dB |
Read our comprehensive review of the Denon AVR-X1800H. Discover its features, specs, performance, and why it's a top choice for audio enthusiasts.
www.zkelectronics.com
At denon.com I could not find any performance specifications besides power.
Do you have a better source?
If it is correct, that is not SINAD but noise only and it is in relation to FS I suppose and not 5W and A-rated of course.
For 5W and without A filter this would be already quite different and then there is THD.
But the Denon is still an impressive peace of gear for the price. Just not what I am interested in.
SNR of the A5 is ≈120dB and that is without A-rating.