What they actually do
AV receivers across channel counts, integrated stereo amplifiers, and a soundbar range. The specification style is the point: “100 W into 8 ohms, 20 Hz–20 kHz, two channels driven, 0.08% THD” says something that “1,000 W” does not.
Why that matters on this site
This catalog is full of power figures that are sums of peaks. A receiver whose maker publishes the conditions can be compared with another that does the same, and no others.
What changes between generations
The HDMI board, more than the amplifier. Whether a model passes 4K at 120 Hz with VRR dates it faster than anything about its sound.
The three Denon models reviewed here, in the United States
The AVR-X1800HDAB is the European receiver; in the United States the same design is sold as the AVR-X1800H, without the DAB tuner, at $849 on Amazon.com on October 25, 2026. The DHT-S218 soundbar was $299 the same day. The PMA-600NE integrated amplifier has an Amazon.com product page, but no seller was offering it there that day.