The catch
Marantz CINEMA 30
An external stereo amp is needed for thirteen-channel playback. Dirac is an additional license you can choose to add.
Side by side
Marantz CINEMA 30 vs Onkyo TX-RZ70: Marantz can expand past 7.1.4, Onkyo comes with Dirac
Quick verdict
A credible thirteen-speaker plan, or three to four independently adjusted powered subs, makes CINEMA 30 the choice. CINEMA 30 can process thirteen main speakers, with a separate stereo amp needed beyond its eleven internal amps. RZ70 is the choice when 7.1.4 and two subs are the final plan and included full-bandwidth Dirac or supported front HDMI access is useful. Adding amps does not take RZ70 beyond eleven processed main channels.
Before you buy
Why, and what it costs you
For a bigger room, the right processor comes before an extra amplifier
Say the next room has a supported thirteen-speaker plan. CINEMA 30 lets you keep the receiver and add two external amplifier channels. RZ70 is capped at eleven processed main channels, so an extra stereo amp can’t supply the two soundtrack channels it lacks. If the current 7.1.4 layout is final, both already power it internally, and the processing headroom on Marantz may be worth nothing. Begin with speaker positions you can use. A maximum number printed on a product page is the wrong starting point.
Where this comes from
Thirteen processing channels against eleven, matched against room expansion in stages. Each has eleven internal amps.
The catch
Onkyo TX-RZ70
Adding amplifiers doesn’t change the limit of eleven main processing channels.
Marantz CINEMA 30
- Why pick it
- You plan a supported thirteen-speaker layout and have space for external stereo amplification.
- Separate settings on the receiver are needed for three or four powered subs.
- The catch
- An external stereo amp is needed for thirteen-channel playback. Dirac is an additional license you can choose to add.
Onkyo TX-RZ70
- Why pick it
- Your finished room ends at 7.1.4 and two subs, and you want Dirac included.
- Easy front access is needed for compatible temporary HDMI sources.
- The catch
- Adding amplifiers doesn’t change the limit of eleven main processing channels.
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What this page compares
Marantz CINEMA 30 vs Onkyo RZ70 for a completed 7.1.4 room or a larger planned theater, comparing expansion, multiple subs and everyday front-source access.
Each has eleven built-in amps, so a complete 7.1.4 system works with either. A larger layout later, sub control and source access are the useful reasons to choose between them.
Which one fits
Pick the situations that sound like you
A supported thirteen-speaker room later
Marantz processes thirteen when paired with an external stereo amp.
- Marantz CINEMA 30
- Better fit
- Onkyo TX-RZ70
- Not suitable
Four powered subs, each adjusted on its own
Four independent sub outputs are on Marantz.
- Marantz CINEMA 30
- Better fit
- Onkyo TX-RZ70
- Caution
A completed 7.1.4 room where supported guests connect easily
Front AUX is on Onkyo.
- Marantz CINEMA 30
- Caution
- Onkyo TX-RZ70
- Better fit
One-box 7.1.4 alone
Eleven main amplifiers are built into both.
- Marantz CINEMA 30
- Good
- Onkyo TX-RZ70
- Good
In practice
Differences you will notice
For a bigger room, the right processor comes before an extra amplifier
Say the next room has a supported thirteen-speaker plan. CINEMA 30 lets you keep the receiver and add two external amplifier channels. RZ70 is capped at eleven processed main channels, so an extra stereo amp can’t supply the two soundtrack channels it lacks. If the current 7.1.4 layout is final, both already power it internally, and the processing headroom on Marantz may be worth nothing. Begin with speaker positions you can use. A maximum number printed on a product page is the wrong starting point.
How we worked this out
Thirteen processing channels against eleven, matched against room expansion in stages. Each has eleven internal amps.
You need four controls for four subs only if the installation really calls for them
Separate receiver settings for four powered subs are available on CINEMA 30, while RZ70 has two independent sub outputs. In a room already designed around three or four subs in different places, Marantz means you don’t have to rely on an extra control arrangement for the additional feeds. With one or two subs, the output count gives no buying advantage. Separate controls also don’t prove a better acoustic result unless placement and measurement work come with them.
How we worked this out
The planned number of separately adjusted subs, matched against the number of independent outputs. The acoustic benefit has not been measured.
In a fixed theater, easy-to-reach connections can be worth more than channels that go unused
In a finished 7.1.4 room, the nuisance that keeps coming back may be a supported laptop or camera that visitors bring. The front AUX on RZ70 can solve the problem of reaching the rear cables, while CINEMA 30 uses rear HDMI inputs. At 4K60 the Onkyo front input requires 8-bit YCbCr 4:2:0, and it doesn’t support 4K120, so visitors may need a different output mode or a rear route. This everyday access benefit can count for more than the unused thirteenth channel on Marantz, with no sound-quality advantage implied.
How we worked this out
Front access against rear access to sources, matched against a fixed speaker plan and temporary devices connected again and again.
Plan your receiver connectionsLay out my system
Check a documented speaker layout against HDMI sources and external-amplifier plans.
Marantz CINEMA 30
Handles your setup
Runs 5.1.2 on its own built-in amplifiers. Takes 3 HDMI devices, 1 of them at 4K/120Hz.
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.
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
Marantz, US black standalone receiver
CINEMA 30
You plan a supported thirteen-speaker layout and have space for external stereo amplification.
- Best for
- You plan a supported thirteen-speaker layout and have space for external stereo amplification.
Facts we checked
- 7.1.4 now: Eleven internal amps
- Main processing ceiling: Thirteen channels
- Independent sub outputs: Four
- Temporary source access: Rear HDMI inputs
Option B
Onkyo, US black standalone receiver
TX-RZ70
Your finished room ends at 7.1.4 and two subs, and you want Dirac included.
- Best for
- Your finished room ends at 7.1.4 and two subs, and you want Dirac included.
Facts we checked
- 7.1.4 now: Eleven internal amps
- Main processing ceiling: Eleven channels
- Independent sub outputs: Two
- Temporary source access: Front 9 Gbps AUX
Spec by spec
Where they really differ
| Spec | Marantz CINEMA 30 | Onkyo TX-RZ70 | In practice |
|---|---|---|---|
| 7.1.4 now | Eleven internal amps | Eleven internal amps | The complete main-room layout is covered by either. |
| Main processing ceiling | Thirteen channels | Eleven channels | With extra power amplification, Marantz supports a larger documented plan. |
| Independent sub outputs | Four | Two | How many separately adjusted subs you plan on matters. |
| Temporary source access | Rear HDMI inputs | Front 9 Gbps AUX | Onkyo puts a supported visitor connection up front. |
| Included room correction | Audyssey XT32, Dirac optional | Dirac Live Full Bandwidth | How much the cost differs depends on the workflow you really need. |
Trade-offs
What each pick costs you
With Marantz CINEMA 30
- Audyssey XT32 comes included. Adding speakers takes suitable positions, wiring and installation.
With Onkyo TX-RZ70
- Front AUX has lower bandwidth, and powered Zone 2 takes the surround backs out of a 7.1.4 layout.
Change of plan
When the answer changes
Your room plan goes beyond eleven main channels or two independent subs
Go with Marantz CINEMA 30. Marantz brings the processing and outputs that apply.
The room is finished, and what matters is front access plus included Dirac
Go with Onkyo TX-RZ70. Onkyo delivers those practical benefits with no need for expansion you won’t use.
Decision guide
Before you buy
Replacing the receiver after a room upgrade is something to avoid, but so is paying for a future layout that never gets installed.
What this page can’t tell you
- Correction and sound quality are not ranked by measurement. Once both receivers satisfy the installation, current offers decide price value.
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 |
|---|---|---|---|
| Marantz CINEMA 30 |
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| |
| Onkyo TX-RZ70 |
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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.
Marantz CINEMA 30
You plan a supported thirteen-speaker layout and have space for external stereo amplification.
Separate settings on the receiver are needed for three or four powered subs.
See price & reviews on AmazonOnkyo TX-RZ70
Your finished room ends at 7.1.4 and two subs, and you want Dirac included.
Easy front access is needed for compatible temporary HDMI sources.
See price & reviews on AmazonEach link opens in a new tab.
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