What the maker puts in writing
- “5.1-channel 80-Watt powerful surround sound system”
- “4K60, 4K120AB and 8K60B HDMI 2.1 with HDCP 2.3 and eARC (4 in/1 out)”
- “Dolby Vision, Hybrid Log-Gamma and BT.2020”
- “Supports enhanced media and gaming - ALLM, VRR”
- “YPAO automatic room calibration”
- “Speaker wire perfectly matched for each speaker”
- Description: “includes an AV receiver with the latest in video processing, Dolby TrueHD, DTS-HD Master Audio, wireless streaming and more”
It is the only system here that publishes the full console set
Three features, and they work as a set.
4K at 120 Hz. The mode a current console runs in. Yamaha’s own YHT-4950U at $499.99 publishes only 4K at 60, and the Denon bundles here publish 4K/120Hz passthrough without ALLM or VRR.
ALLM — Auto Low Latency Mode. The console tells the television to switch into game mode by itself, turning off the picture processing that adds input lag. Without it you set game mode by hand, and forget to set it back for films.
VRR — Variable Refresh Rate. The display’s refresh rate follows the console’s actual frame rate rather than running at a fixed 60 Hz. When a game dips to 48 frames, the screen matches it instead of tearing or stuttering.
All three travel over HDMI 2.1, with HDCP 2.3 for the copy protection modern sources demand. Four inputs and one output, so the receiver does the switching.
And eARC, which is the audio half of the same point
eARC — enhanced Audio Return Channel — carries audio back from the television to the receiver, and the “enhanced” is the operative word: plain ARC is limited to compressed surround, where eARC carries full-bandwidth lossless formats.
Which is why the description’s next claim follows: Dolby TrueHD and DTS-HD Master Audio. Those are the lossless soundtracks a Blu-ray carries — bit-for-bit identical to the studio master. Over plain ARC they arrive compressed; over eARC they do not.
So apps running inside the television — where most streaming now happens — can send their full soundtrack down one cable.
The shelf, in order of what it claims:
Goldwood $120.88 — “700 watts system power”, unqualified
Sony $329 — “600W power output”, unqualified
Onkyo TX-NR7100 — “220W per channel at 6 ohms”
this $749.95 — “80-Watt”
Denon AVR-S670H — “75W”
A system total sums every channel at peak, measured generously. A per-channel figure is what one speaker actually receives. Eighty watts per channel into a 5.1 system is a competent mid-range AV receiver.
So the smallest advertised number on this shelf belongs to one of the two most capable systems on it.
Speaker wire matched to each speaker
Speaker wire perfectly matched for each speaker.
Pre-cut lengths — longer for the surrounds, shorter for the front three — rather than one reel to divide.
The commonest failure in a first 5.1 installation is running out of cable for the rear speakers, discovering it halfway through, and either moving the sofa or abandoning surround.
Only one other listing addresses it: the Goldwood at $120.88 publishes 15 feet to the fronts and center and 25 feet to the rears, though its leads are RCA and cannot be replaced or extended with ordinary wire. Yamaha’s YHT-4950U includes “Speaker wire” without a length. The five Klipsch speaker packs supply none.
YPAO, and why a 5.1 box needs it
YPAO measures the room with a microphone and corrects for it — speaker distances, channel levels, and the response the room imposes.
On a system of small satellites in unequal positions, that is worth more than on matched towers: the center speaker sits in a cabinet, the surrounds on walls at different distances, the subwoofer in a corner. Without correction the channel levels are wrong before you start.
The two most expensive Klipsch bundles here publish “automatic room calibration” from their Onkyo receiver; the Yamaha YHT-4950U publishes YPAO too.
What is not published
No height channels. A flat 5.1. And at almost exactly this price, Klipsch’s Reference Cinema 5.1.4 at $749.99 has four — height from the front and back — though with no receiver, and needing a nine-channel one.
So the seven-hundred-and-fifty-dollar decision on this shelf is explicit: this for video, gaming and a complete box; Klipsch for Atmos and nothing else; Energy + Denon at $749 for 8K streaming with older speakers.
No component dimensions, which Yamaha’s own YHT-4950U publishes in full — receiver 17 × 6 × 12 in, satellites 4 × 6 × 4, center 10 × 4 × 4, subwoofer 11 × 11 × 13. On a six-box system that is the omission that costs you a measuring tape.
No frequency response, where the YHT-4950U publishes 28Hz/25kHz. No sensitivity, where the Klipsch R-620F pack publishes 96 dB. No standby power, where the YHT-4950U publishes ≤ 0.2 W.
24,494 g is published, and 889 × 889 × 381 mm is a carton figure.
Prices quoted in this text were read on October 4, 2026. The live price is at the top of the page.
