Main trade-off
Onkyo TX-RZ70
Two independent sub outputs limit direct receiver-side control for a larger sub setup.
Head-to-head
Onkyo TX-RZ70 vs Denon AVR-X4800H: Onkyo avoids the extra amp, Denon handles four independent subs
The short answer
Choose RZ70 for one-box 7.1.4 with included full-bandwidth Dirac and one or two independent subs. X4800H needs an external stereo amp for 7.1.4, but adds four independent sub outputs and seven rear high-refresh HDMI inputs. Choose Denon when that amplifier is already available or those additional sub and source connections solve the actual room plan.
Before you choose
The reasoning and the trade-offs
An amp already on the shelf can reverse the one-box advantage
For a fresh 7.1.4 build, RZ70 supplies the eleven amps directly while X4800H needs a stereo power amp. If a suitable amp already powers the front speakers and has a proper installation space, Denon can reuse it. That makes the extra sub and source connections more relevant than the raw internal amp count. If the amp must be bought and squeezed into an unsuitable space, the supposed receiver bargain is incomplete. Compare actual equipment and offers rather than receiver price alone.
What this is based on
Eleven requested channels versus nine and eleven internal amps, crossed with ownership and installation constraints.
Main trade-off
Denon AVR-X4800H
Nine internal amps require additional stereo power for 7.1.4. Dirac is an optional extra.
Onkyo TX-RZ70
- Choose it for
- You are starting a 7.1.4 system without an external amp and want all eleven amps in one receiver.
- Included Dirac or supported front HDMI access matters.
- Main trade-off
- Two independent sub outputs limit direct receiver-side control for a larger sub setup.
Denon AVR-X4800H
- Choose it for
- A suitable stereo power amp is already installed and three or four subs need separate settings.
- Seven permanent high-refresh sources need rear connections.
- Main trade-off
- Nine internal amps require additional stereo power for 7.1.4. Dirac is an optional extra.
About this comparison
Onkyo RZ70 vs Denon X4800H for a new 7.1.4 theater or a room reusing an amplifier. Compare independent subs, source placement and complete-system costs.
Both process eleven main speakers and suit similar home-theater builds. Whether a suitable external amp is already owned can reverse the more practical purchase.
Winner by situation
Start with what you need it to do
New 7.1.4 system without an external power amp
Onkyo has eleven internal main amps.
- Onkyo TX-RZ70
- Better fit
- Denon AVR-X4800H
- Caution
Existing stereo amp plus three or four independently adjusted subs
Denon reuses the amp and provides four independent outputs.
- Onkyo TX-RZ70
- Caution
- Denon AVR-X4800H
- Better fit
Seventh permanent high-refresh player
Denon seventh input is high-refresh capable.
- Onkyo TX-RZ70
- Caution
- Denon AVR-X4800H
- Better fit
Compatible guest source connected at the front
Onkyo has front AUX, with format limitations.
- Onkyo TX-RZ70
- Better fit
- Denon AVR-X4800H
- Caution
What matters in practice
The differences that matter
An amp already on the shelf can reverse the one-box advantage
For a fresh 7.1.4 build, RZ70 supplies the eleven amps directly while X4800H needs a stereo power amp. If a suitable amp already powers the front speakers and has a proper installation space, Denon can reuse it. That makes the extra sub and source connections more relevant than the raw internal amp count. If the amp must be bought and squeezed into an unsuitable space, the supposed receiver bargain is incomplete. Compare actual equipment and offers rather than receiver price alone.
How we reached this conclusion
Eleven requested channels versus nine and eleven internal amps, crossed with ownership and installation constraints.
A splitter cannot give a third sub its own receiver setting
A room planned around three or four powered subs can use X4800H four independent outputs. RZ70 has two independent outputs. Duplicating one feed may connect another sub, but does not add a third receiver level or distance control. External sub processing can change the decision, though it adds equipment and setup. For one or two subs, the unused Denon outputs alone do not establish a benefit or a better acoustic result.
How we reached this conclusion
Desired independent settings compared with physical independently adjustable outputs. Distribution and acoustic optimization are separate.
The final HDMI socket has two very different jobs
Denon seventh input is a rear high-refresh route for another permanent compatible player. Onkyo seventh input is front AUX, which is easier for visitors but limited to 9 Gbps. At 4K60 it needs 8-bit YCbCr 4:2:0. A family with a full permanent gaming collection may prefer Denon, while one with fewer permanent players and regular supported laptop or camera use may prefer Onkyo access. Count devices by role and format, not just seven total sockets.
How we reached this conclusion
Exact seventh-input placement and bandwidth crossed with permanent and guest use.
Plan your receiver connectionsPlan my setup
Check a documented speaker layout against HDMI sources and external-amplifier plans.
Onkyo TX-RZ70
Supports your setup
Supports 5.1.2 using the receiver's own amplifiers. Connects 3 HDMI devices, including 1 at 4K/120Hz. Use the six rear inputs for 4K/120Hz. The front input has lower limits.
Denon AVR-X4800H
Supports your setup
Supports 5.1.2 using the receiver's own amplifiers. Connects 3 HDMI devices, including 1 at 4K/120Hz.
A powered subwoofer is separate from the speaker-channel count. This checks one main room. Zone 2, bi-amping and unusual speaker assignments need another manual check. Allow ventilation space and confirm HDMI settings, cables and speaker impedance before installing.
Choice A
Onkyo, US black standalone receiver
TX-RZ70
You are starting a 7.1.4 system without an external amp and want all eleven amps in one receiver.
- Best matched use
- You are starting a 7.1.4 system without an external amp and want all eleven amps in one receiver.
Checked facts
- Built-in main amps: Eleven
- Independent sub outputs: Two
- Seventh HDMI input: Front 9 Gbps AUX
- Main processing ceiling: Eleven channels
Choice B
Denon, AVR-X4800H
AVR-X4800H
A suitable stereo power amp is already installed and three or four subs need separate settings.
- Best matched use
- A suitable stereo power amp is already installed and three or four subs need separate settings.
Checked facts
- Built-in main amps: Nine
- Independent sub outputs: Four
- Seventh HDMI input: Rear high-refresh input
- Main processing ceiling: Eleven channels
Meaningful differences
What changes the fit
| What changes | Onkyo TX-RZ70 | Denon AVR-X4800H | Why it matters |
|---|---|---|---|
| Built-in main amps | Eleven | Nine | Onkyo avoids a separate main-room amp for 7.1.4. |
| Independent sub outputs | Two | Four | Denon directly provides more separate receiver settings. |
| Seventh HDMI input | Front 9 Gbps AUX | Rear high-refresh input | Choose accessible supported guests or a permanent fast source. |
| Main processing ceiling | Eleven channels | Eleven channels | Neither is a thirteen-main-speaker platform. |
What you give up
Every choice has a cost
If you choose Onkyo TX-RZ70
- Front HDMI is lower bandwidth. Powered Zone 2 can remove the surround-back pair.
If you choose Denon AVR-X4800H
- Audyssey XT32 is included. Only budget Dirac if it is part of your chosen setup workflow.
Recommendation switch
The decision flips if...
Avoiding a separate main amplifier is the priority
Choose Onkyo TX-RZ70. RZ70 supplies all eleven amps.
Existing amplification makes more independent sub outputs useful
Choose Denon AVR-X4800H. X4800H adds four sub settings while retaining eleven-channel processing.
What matters in practice
Before you choose
You want eleven main speakers without unnecessary boxes, while multiple subs may need more receiver controls than the one-box option supplies.
What this comparison cannot tell you
- No measured sound or correction superiority. Both have an eleven-main-channel processing ceiling.
What the facts say
What the comparison shows
Useful conclusions from the current AV receivers comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Onkyo TX-RZ70 |
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| Denon AVR-X4800H |
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Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Onkyo TX-RZ70
You are starting a 7.1.4 system without an external amp and want all eleven amps in one receiver.
Included Dirac or supported front HDMI access matters.
See price & reviews on AmazonDenon AVR-X4800H
A suitable stereo power amp is already installed and three or four subs need separate settings.
Seven permanent high-refresh sources need rear connections.
See price & reviews on AmazonLinks open in a new tab.