The catch
Denon AVR-S670H
Just three HDMI inputs can do 4K120.
Side by side
Denon AVR-S670H vs Yamaha RX-V4A: Denon takes six sources and MM phono, Yamaha suits an existing MusicCast home
Quick verdict
Six HDMI sources and a direct MM turntable connection point to the S670H. If MusicCast is already in the room and four HDMI sources do the job, the RX-V4A is the pick, once you have checked its HDMI hardware and video-format limits.
Before you buy
Why, and what it costs you
Shelf space can settle the pair before HDMI does
Compared with the S670H, the RX-V4A takes up about 1.6 inches more front-to-back space.
Where this comes from
Take the published 13.3-inch Denon depth away from Yamaha's 14.875 inches and you get 1.575 inches. That figure leaves out ventilation and cables.
The catch
Yamaha RX-V4A
Four HDMI inputs in all, and no MM phono socket.
Denon AVR-S670H
- Why pick it
- You want five or six HDMI sources hooked up permanently
- Your MM turntable outputs only phono and needs to plug in directly
- The catch
- Just three HDMI inputs can do 4K120.
Yamaha RX-V4A
- Why pick it
- Other rooms in your home already use MusicCast
- Your plan calls for four HDMI sources and YPAO setup
- The catch
- Four HDMI inputs in all, and no MM phono socket.
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What this page compares
Denon S670H against Yamaha RX-V4A in a five-speaker room, covering music platforms, phono inputs and the HDMI hardware checks on the Yamaha.
Six HDMI sources and a direct MM turntable connection point to the S670H. If MusicCast is already in the room and four HDMI sources do the job, the RX-V4A is the pick, once you have checked its HDMI hardware and video-format limits.
Which one fits
Pick the situations that sound like you
An MM turntable plus six HDMI sources
S670H comes with six inputs and an MM stage. RX-V4A has four inputs and lacks an MM stage.
- Denon AVR-S670H
- Better fit
- Yamaha RX-V4A
- Caution
A home already on MusicCast
RX-V4A is part of the relevant music platform.
- Denon AVR-S670H
- Depends
- Yamaha RX-V4A
- Better fit
A home already on HEOS
S670H is part of the relevant music platform.
- Denon AVR-S670H
- Better fit
- Yamaha RX-V4A
- Depends
Four 4K120 sources, with the RX-V4A hardware revision unknown
Denon offers just three fast inputs. For Yamaha, confirm the exact hardware, firmware and format.
- Denon AVR-S670H
- Caution
- Yamaha RX-V4A
- Depends
In practice
Differences you will notice
Shelf space can settle the pair before HDMI does
Compared with the S670H, the RX-V4A takes up about 1.6 inches more front-to-back space.
How we worked this out
Take the published 13.3-inch Denon depth away from Yamaha's 14.875 inches and you get 1.575 inches. That figure leaves out ventilation and cables.
A fourth fast port does not promise every format will work
Only go with the RX-V4A for four 4K120 inputs once you have checked the exact signal and hardware revision.
How we worked this out
Yamaha specifies a 24Gbps video path and documents an HDMI board update that applies to some early units with certain sources.
Neither network platform gives you more speaker channels
Choosing MusicCast or HEOS is a separate matter from physical Atmos expansion.
How we worked this out
Five main amplifier channels and documented 5.1 configurations come with both receivers.
Plan your receiver connectionsLay out my system
Check a documented speaker layout against HDMI sources and external-amplifier plans.
Denon AVR-S670H
Cannot handle this setup
This layout is not one of its documented speaker setups.
Yamaha RX-V4A
Cannot handle this setup
This layout is not one of its documented speaker setups.
A powered subwoofer does not count toward the speaker channels. This checks one main room. Check Zone 2, bi-amping and unusual speaker assignments yourself. Leave room for ventilation, and confirm HDMI settings, cables and speaker impedance before you install.
Option A
Denon, AVR-S670H
AVR-S670H
Six HDMI inputs, HEOS streaming and a moving-magnet phono input come on this five-speaker receiver. It makes sense for a room that will remain 5.1.
- Best for
- Movies and records on a five-speaker system
Facts we checked
- 5 main processing channels and 5 built-in amplifier channels
- Of 6 HDMI inputs, 3 support 4K120 video
- 1 HDMI output
- Room setup by Audyssey MultEQ
- Subwoofer outputs aside, 0 full-range main-channel pre-outs
- Before ventilation space, the chassis is 6-inch high with antennas horizontal
Option B
Yamaha, RX-V4A
RX-V4A
This five-channel MusicCast receiver has four HDMI inputs and YPAO setup. It suits a room that will stay at 5.1, particularly in a home that already uses MusicCast.
- Best for
- A MusicCast room with five speakers
Facts we checked
- 5 main processing channels and 5 built-in amplifier channels
- Of 4 HDMI inputs, 4 support 4K120 video
- 1 HDMI output
- Room setup by YPAO
- Subwoofer outputs aside, 0 full-range main-channel pre-outs
- Before ventilation space, the chassis is 6.75-inch high with antennas horizontal
Spec by spec
Where they really differ
| Spec | Denon AVR-S670H | Yamaha RX-V4A | In practice |
|---|---|---|---|
| HDMI source inputs | 6 | 4 | Two more sources fit on the Denon with no switch. |
| 4K120 input count | 3 | 4 with format and hardware caveats | Before you rely on Yamaha's advantage in numbers, check the source format and hardware revision. |
| Network music platform | HEOS | MusicCast | The multiroom speakers you already own can decide which app and ecosystem suits you. |
| MM phono input | Yes | No | With the Yamaha you need a turntable with line output, or an external phono stage. |
| Automatic room correction | Audyssey MultEQ | YPAO | The setup and correction systems are not the same. |
| Published chassis depth | 13.3 inches | 14.875 inches | Before allowing for cable bends, the Yamaha uses about 1.6 inches more shelf depth. |
Trade-offs
What each pick costs you
With Denon AVR-S670H
- A MusicCast speaker group cannot include HEOS.
With Yamaha RX-V4A
- Check early-unit hardware and the 24Gbps video limits.
Change of plan
When the answer changes
You want five or six HDMI sources hooked up permanently
Go with Denon AVR-S670H. Five or six sources can stay connected on its six HDMI inputs.
Other rooms in your home already use MusicCast
Go with Yamaha RX-V4A. MusicCast support lets it join the music setup you already have. Check whether the HDMI board qualifies before planning for 4K120.
You will put in two physical height speakers
Neither model fits. Neither the documented processing layouts nor the internal-amplifier ones cover this requirement. Pick a receiver that has the physical configuration you need.
Decision guide
How to decide
The S670H is the choice for six HDMI sources with a turntable plugged straight into an MM input. The RX-V4A suits a room that already runs MusicCast and needs only four HDMI sources, as long as its HDMI hardware and video-format limits check out.
Keep the music system you already use
Sharing music with compatible equipment in other rooms is where HEOS and MusicCast earn their keep. If your home already runs either platform, that is a practical reason to stay with it. Your platform preference does nothing to the number of physical main-room speakers either receiver supports, since both are five-channel receivers for a room that will stay at 5.1.
Check the video path on the Yamaha
The four HDMI inputs on the Yamaha have a 24Gbps specification. For certain early receivers used with Xbox Series X or NVIDIA RTX30 at 4K120, the manufacturer documented a hardware update, while later production units did not have that particular issue. Current firmware and the exact signal format still matter, though, so four inputs should never be taken as unrestricted compatibility.
Account for analog gear and shelf depth
One box can drop out of a record-playing system thanks to the S670H's MM phono input. The RX-V4A still works with a turntable that supplies line-level audio. Its chassis is deeper, which affects the cabinet math as well. Measure the space for rear plugs and cables on its own, because published chassis dimensions do not cover the full installation envelope.
What this page can’t tell you
- No claim is made that either calibration system will sound better in a room nobody has measured.
By the numbers
What the data shows
What we found across the AV receivers we compare, plus the checked facts behind each finding.
How many fit
Only 2 of the 34 models checked meet every need here: “Stay with a five-speaker setup”, “Keep six HDMI sources plugged in”, and “Plug an MM turntable straight in”.
2 models fit, out of 34 checkedShow the facts and the math
How we countedThe count uses each product's current fit ratings for “Stay with a five-speaker setup”, “Keep six HDMI sources plugged in”, and “Plug an MM turntable straight in”. A need with no documented match is not counted.
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Denon AVR-S670H |
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| Yamaha RX-V4A |
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Ready to buy
See today’s price and what owners say
Open either model on Amazon for the current price, customer reviews and delivery options.
Denon AVR-S670H
You want five or six HDMI sources hooked up permanently
See price & reviews on AmazonYamaha RX-V4A
Other rooms in your home already use MusicCast
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