The catch
Onkyo TX-RZ70
Even with added power amps, eleven main processing channels is the ceiling.
Side by side
Onkyo TX-RZ70 vs Denon AVR-X6800H compared: Onkyo comes with Dirac, Denon has room for thirteen speakers
Quick verdict
X6800H is the one to pick if you plan a supported thirteen-speaker layout down the road, or if more than two subs must be adjusted independently. Thirteen main channels can be processed by X6800H, though anything above eleven needs external stereo amplification. If the room is a final 7.1.4 and you value included full-bandwidth Dirac plus usable supported front HDMI, RZ70 is the better match. Either receiver powers 7.1.4 on its own. On the software side, Denon includes Audyssey XT32 and sells optional Dirac separately.
Before you buy
Why, and what it costs you
An extra amplifier can’t get you past the wrong processing ceiling
A bigger room may come with a supported plan for thirteen main speakers. X6800H can process them, using an external stereo amp beyond its eleven internal channels. Attaching a power amp doesn’t give RZ70 two more processed main channels. When the future plan is real, Denon can spare you from replacing the receiver. If the room stays at 7.1.4, both already supply the main-room amplification you need, and the extra processing may never get used.
Where this comes from
Processing and amplification counted on their own, across a room that expands in stages. Only supported thirteen-speaker layouts qualify.
The catch
Denon AVR-X6800H
Another amp is needed for thirteen main speakers, and Dirac is an extra license you may choose to add.
Onkyo TX-RZ70
- Why pick it
- Full-bandwidth Dirac should come included, and your end goal is a 7.1.4 room using one or two subs.
- Front HDMI access suits compatible sources you plug in temporarily.
- The catch
- Even with added power amps, eleven main processing channels is the ceiling.
Denon AVR-X6800H
- Why pick it
- You can add external stereo amplification, and a supported thirteen-speaker plan is a credible one.
- Three or four subs each need their own settings on the receiver.
- The catch
- Another amp is needed for thirteen main speakers, and Dirac is an extra license you may choose to add.
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What this page compares
Choosing between Onkyo RZ70 and Denon X6800H for 7.1.4 now and a bigger room later? Guest-source access, license costs, independent subs and processing limits are all compared.
Each powers eleven main speakers, and both are credible for a substantial theater. The real dividing line is Denon’s room to expand against Onkyo’s included correction and front access.
Which one fits
Pick the situations that sound like you
A finished 7.1.4 room with full-bandwidth Dirac included
The specified license comes with Onkyo, while Denon needs an optional purchase.
- Onkyo TX-RZ70
- Better fit
- Denon AVR-X6800H
- Caution
A supported thirteen-speaker room later
Add stereo amplification and Denon processes thirteen.
- Onkyo TX-RZ70
- Not suitable
- Denon AVR-X6800H
- Better fit
Three or four subs, each adjusted independently
Four independent outputs are on Denon.
- Onkyo TX-RZ70
- Caution
- Denon AVR-X6800H
- Better fit
A supported temporary source plugged in at the front
Onkyo offers front AUX, within the limits of its format table.
- Onkyo TX-RZ70
- Better fit
- Denon AVR-X6800H
- Caution
In practice
Differences you will notice
An extra amplifier can’t get you past the wrong processing ceiling
A bigger room may come with a supported plan for thirteen main speakers. X6800H can process them, using an external stereo amp beyond its eleven internal channels. Attaching a power amp doesn’t give RZ70 two more processed main channels. When the future plan is real, Denon can spare you from replacing the receiver. If the room stays at 7.1.4, both already supply the main-room amplification you need, and the extra processing may never get used.
How we worked this out
Processing and amplification counted on their own, across a room that expands in stages. Only supported thirteen-speaker layouts qualify.
A third sub and a visitor’s laptop push the decision opposite ways
Separate settings for as many as four powered subs are supported directly by X6800H. RZ70 supports two, but it adds a convenient front HDMI for a supported temporary source. A room designed from the start around three or four subs points to Denon routing. A finished room with two subs and frequent visiting devices can get more everyday value from the front access on Onkyo. Its front 4K60 format is limited to 8-bit YCbCr 4:2:0, so laptop compatibility still has to be checked.
How we worked this out
Lasting sub-control needs, matched against temporary sources that connect over and over. Independent outputs and physical access solve different problems.
Your preference for calibration changes which price to compare
If you specifically want full-bandwidth Dirac, compare RZ70 with its included license against X6800H plus the appropriate optional license. If you’re happy with the Audyssey XT32 included with Denon, there’s no reason to add a Dirac cost automatically. Optional bass-management upgrades come with their own terms on either platform. This shifts the purchase math, though the license bundle doesn’t prove which receiver will sound better in a particular room.
How we worked this out
Correction products verified as included or optional, matched against a setup workflow chosen on purpose. No current price and no measured acoustic superiority is assumed.
Plan your receiver connectionsLay out my system
Check a documented speaker layout against HDMI sources and external-amplifier plans.
Onkyo TX-RZ70
Handles your setup
Runs 5.1.2 on its own built-in amplifiers. Takes 3 HDMI devices, 1 of them at 4K/120Hz. Use the six rear inputs for 4K/120Hz. The front input has lower limits.
Denon AVR-X6800H
Handles your setup
Runs 5.1.2 on its own built-in amplifiers. Takes 3 HDMI devices, 1 of them at 4K/120Hz.
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
Onkyo, US black standalone receiver
TX-RZ70
Full-bandwidth Dirac should come included, and your end goal is a 7.1.4 room using one or two subs.
- Best for
- Full-bandwidth Dirac should come included, and your end goal is a 7.1.4 room using one or two subs.
Facts we checked
- Internal main amps: Eleven
- Processing ceiling: Eleven main channels
- Independent subs: Two
- Front source access: Front 9 Gbps AUX
Option B
Denon, AVR-X6800H
AVR-X6800H
You can add external stereo amplification, and a supported thirteen-speaker plan is a credible one.
- Best for
- You can add external stereo amplification, and a supported thirteen-speaker plan is a credible one.
Facts we checked
- Internal main amps: Eleven
- Processing ceiling: Thirteen main channels
- Independent subs: Four
- Front source access: Rear HDMI inputs
Spec by spec
Where they really differ
| Spec | Onkyo TX-RZ70 | Denon AVR-X6800H | In practice |
|---|---|---|---|
| Internal main amps | Eleven | Eleven | Either receiver powers the starting 7.1.4 system directly. |
| Processing ceiling | Eleven main channels | Thirteen main channels | The larger documented plan with extra amplification is supported by Denon alone. |
| Independent subs | Two | Four | More separate settings on the receiver side are supported by Denon. |
| Front source access | Front 9 Gbps AUX | Rear HDMI inputs | Supported guest connections are easier on Onkyo. |
| Included correction | Dirac Live Full Bandwidth | Audyssey XT32, paid optional Dirac | In the price comparison, count only the licenses you need. |
Trade-offs
What each pick costs you
With Onkyo TX-RZ70
- Powered Zone 2 takes the surround backs out of 7.1.4, and front AUX is 9 Gbps.
With Denon AVR-X6800H
- In a smaller room that stays as it is, four sub outputs and extra processed channels don’t establish an acoustic benefit.
Change of plan
When the answer changes
Eleven main channels suit the finished room, and you want Dirac included
Go with Onkyo TX-RZ70. That complete core system comes from Onkyo.
You’re planning either a larger main layout or more independent subs
Go with Denon AVR-X6800H. Denon brings added processing and output capacity.
Decision guide
Before you buy
You want a receiver that outlasts a future room upgrade, while the features you can use today do not get buried behind unused capacity.
What this page can’t tell you
- Sound and correction have no measured winner. Adding an external amp leaves RZ70 main-channel processing unchanged.
By the numbers
What the data shows
What we found across the AV receivers we compare, plus the checked facts behind each finding.
Show the facts and the math
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Onkyo TX-RZ70 |
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| Denon AVR-X6800H |
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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.
Onkyo TX-RZ70
Full-bandwidth Dirac should come included, and your end goal is a 7.1.4 room using one or two subs.
Front HDMI access suits compatible sources you plug in temporarily.
See price & reviews on AmazonDenon AVR-X6800H
You can add external stereo amplification, and a supported thirteen-speaker plan is a credible one.
Three or four subs each need their own settings on the receiver.
See price & reviews on AmazonEach link opens in a new tab.
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