The catch
Onkyo TX-RZ70
In 7.1.4, powered Zone 2 still borrows the surround-back amplifiers. Eleven amps can’t power thirteen passive speakers at the same time.
Side by side
Onkyo TX-RZ70 vs Onkyo TX-RZ50: RZ70 drops the extra 7.1.4 amp and splits sub settings apart
Quick verdict
For 7.1.4 in one box, or two subs that need separate receiver settings, RZ70 is the answer. RZ70 runs all eleven main speakers on internal amplification, while RZ50 cannot drive that layout without a stereo power amp. Even so, RZ50 holds up as an option provided you already own a suitable amp and the shared sub setting suits your installation. On both, the front HDMI input tops out at a lower format than the fast rear inputs, and both include full-bandwidth Dirac.
Before you buy
Why, and what it costs you
Having a stereo amp already changes what two extra internal channels are worth
To complete 7.1.4, RZ50 needs two externally powered channels, and RZ70 has them built in. In a new system without an amp, RZ70 takes away a component along with its cabling and installation space. When a suitable amp already powers the front speakers, replacing the receiver only to bring those two channels inside may change very little. Compare the whole system and the offers available now, including any equipment that would end up unused.
Where this comes from
Eleven main speakers requested, against nine or eleven internal amps, matched against equipment already owned.
The catch
Onkyo TX-RZ50
7.1.4 needs external stereo amplification, and the two sub sockets share one receiver setup.
Onkyo TX-RZ70
- Why pick it
- You want seven ear-level speakers plus four heights running with no extra power amp for the main room.
- Two subs each need level and distance set separately on the receiver.
- The catch
- In 7.1.4, powered Zone 2 still borrows the surround-back amplifiers. Eleven amps can’t power thirteen passive speakers at the same time.
Onkyo TX-RZ50
- Why pick it
- Your room stops at nine main speakers, or you have a suitable stereo amp in place for 7.1.4.
- The shared receiver setting is fine for you because there is one sub, or an external sub setup managed independently.
- The catch
- 7.1.4 needs external stereo amplification, and the two sub sockets share one receiver setup.
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What this page compares
Weighing Onkyo RZ70 against RZ50 for 7.1.4, two subs in different spots and shared-room listening? Find out what the upgrade takes away and which front HDMI limits remain.
For a Dirac-based theater, these RZ receivers are the natural upgrade candidates. The useful differences are extra built-in amplification and independent sub control. A general claim about being the flagship adds nothing.
Which one fits
Pick the situations that sound like you
Getting 7.1.4 without a separate main-room amp
Eleven internal amps are inside RZ70.
- Onkyo TX-RZ70
- Better fit
- Onkyo TX-RZ50
- Caution
Independent receiver settings for two subs
The outputs on RZ50 share one setup entry.
- Onkyo TX-RZ70
- Better fit
- Onkyo TX-RZ50
- Caution
You already have a suitable stereo amp and external sub management
Either can cover the plan, so compare the full offers available now.
- Onkyo TX-RZ70
- Good
- Onkyo TX-RZ50
- Good
Sending 4K120 over the front HDMI
The front inputs on both have lower format limits.
- Onkyo TX-RZ70
- Not suitable
- Onkyo TX-RZ50
- Not suitable
In practice
Differences you will notice
Having a stereo amp already changes what two extra internal channels are worth
To complete 7.1.4, RZ50 needs two externally powered channels, and RZ70 has them built in. In a new system without an amp, RZ70 takes away a component along with its cabling and installation space. When a suitable amp already powers the front speakers, replacing the receiver only to bring those two channels inside may change very little. Compare the whole system and the offers available now, including any equipment that would end up unused.
How we worked this out
Eleven main speakers requested, against nine or eleven internal amps, matched against equipment already owned.
With two subs in different places, the limit of a shared output shows
RZ50 has two subwoofer sockets that share a signal and one setup entry in the receiver, while RZ70 lets the two outputs be adjusted independently. If the subs are at different distances or need different levels, RZ70 gives you separate receiver controls directly. External processing or the controls on the subs themselves may already cover that need on RZ50, so look at what you have before buying. Separate settings are not evidence of a better measured response.
How we worked this out
The exact descriptions of the sub signal and setup, matched against subs placed independently. Optional correction licenses are no substitute for evidence about the physical routing.
Even a flagship’s front socket keeps the old compromise on access
The front HDMI inputs on both are handy for a visiting laptop or camera, yet neither takes 4K120. At 4K60, the front route needs 8-bit YCbCr 4:2:0. When the trouble with RZ50 is a laptop sending 4K60 RGB through front AUX, buying RZ70 won’t fix that format mismatch. Use a supported source setting or a suitable rear route instead. Even after the upgrade, front convenience and front bandwidth are still separate things.
How we worked this out
The shared front 9 Gbps format table, matched against guest devices that connect repeatedly. Exact compatibility with the front output is still required.
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.
Onkyo TX-RZ50
Handles your setup
Runs 5.1.2 on its own built-in amplifiers. Takes 3 HDMI devices, 1 of them at 4K/120Hz. Input count does not guarantee every chroma, bit-depth or DSC combination. Check the manufacturer's HDMI format table and current firmware.
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
You want seven ear-level speakers plus four heights running with no extra power amp for the main room.
- Best for
- You want seven ear-level speakers plus four heights running with no extra power amp for the main room.
Facts we checked
- Built-in main amps: Eleven
- Main processing ceiling: Eleven
- Subwoofer outputs: Two independent outputs
- Front HDMI: 9 Gbps, restricted 4K60 format
Option B
Onkyo, TX-RZ50
TX-RZ50
Your room stops at nine main speakers, or you have a suitable stereo amp in place for 7.1.4.
- Best for
- Your room stops at nine main speakers, or you have a suitable stereo amp in place for 7.1.4.
Facts we checked
- Built-in main amps: Nine
- Main processing ceiling: Eleven
- Subwoofer outputs: Two shared outputs with one setup entry
- Front HDMI: 9 Gbps, restricted 4K60 format
Spec by spec
Where they really differ
| Spec | Onkyo TX-RZ70 | Onkyo TX-RZ50 | In practice |
|---|---|---|---|
| Built-in main amps | Eleven | Nine | RZ70 needs no additional main-room amp for 7.1.4. |
| Main processing ceiling | Eleven | Eleven | Thirteen-speaker processing isn’t something the bigger model adds. |
| Subwoofer outputs | Two independent outputs | Two shared outputs with one setup entry | Placement that varies can make adjustment on the receiver important. |
| Front HDMI | 9 Gbps, restricted 4K60 format | 9 Gbps, restricted 4K60 format | Front AUX doesn’t turn into a high-refresh gaming input after the upgrade. |
Trade-offs
What each pick costs you
With Onkyo TX-RZ70
- Bass Control is an option. Adding internal amps doesn’t raise the processing ceiling of eleven main channels.
With Onkyo TX-RZ50
- The paid Bass Control support available now doesn’t make the physical outputs into outputs that can be adjusted separately on the receiver.
Change of plan
When the answer changes
Two extra amps or independent sub settings are needed by the system
Go with Onkyo TX-RZ70. Those particular capabilities come with RZ70.
Decision guide
Before you buy
An amp you already own can cancel out part of the upgrade, even though you would like fewer external boxes.
What this page can’t tell you
- No sound-quality benefit is made up for either receiver. Support for current Bass Control licensing is kept apart from independent output hardware.
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 |
|
| |
| Onkyo TX-RZ50 |
|
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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
You want seven ear-level speakers plus four heights running with no extra power amp for the main room.
Two subs each need level and distance set separately on the receiver.
See price & reviews on AmazonOnkyo TX-RZ50
Your room stops at nine main speakers, or you have a suitable stereo amp in place for 7.1.4.
The shared receiver setting is fine for you because there is one sub, or an external sub setup managed independently.
See price & reviews on AmazonEach link opens in a new tab.
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