Main trade-off
Marantz CINEMA 50
HDMI inputs are at the rear. Check access or a suitable tested extension for a visiting source, as well as ventilation and cable space. There is no built-in front HDMI socket.
Head-to-head
Choose CINEMA 50 for separate level and distance settings on two to four powered subs, with matching Speaker Layout and output 4 reserved when using four. Rear HDMI access or a tested extension must suffice. Choose TX-RZ50 for accessible front HDMI in the main room when shared sub settings suffice and source, cable and display qualify. Front 4K60 requires 8-bit YCbCr 4:2:0, with no 4K120, 8K or HDMI Zone 2. Both support properly assigned 5.1.4. Neither powers 7.1.4 without an external two-channel amplifier or combines both distinguishing features.
Before you choose
Two differently placed powered subs may need different receiver level and distance settings. CINEMA 50 provides them with matching Speaker Layout, while Onkyo’s second socket repeats the shared signal and setting. With one sub, or a verified external processor already handling adjustment, the receiver advantage can disappear. Rear HDMI access or a tested extension must still suit you. No smoother-bass result is established.
What this is based on
Both manuals explicitly describe their subwoofer outputs. Marantz also documents Standard and Directional routing, and requires Standard for Audyssey Sub EQ HT. Its distance display changes to milliseconds under Dirac Live. Those distinctions prevent separate settings from becoming a claim about equivalent or superior correction methods.
Main trade-off
HDMI inputs are at the rear. Check access or a suitable tested extension for a visiting source, as well as ventilation and cable space. There is no built-in front HDMI socket.
Main trade-off
The two subwoofer sockets share one signal and one receiver setup entry. A second socket does not supply separate level or distance control.


Compare Marantz CINEMA 50 subwoofer controls with Onkyo TX-RZ50 front HDMI access, including video limits, room routing and setup requirements.
Both receivers can anchor a main-room system with five ear-level speakers and four heights. The choice here is about two different jobs. Marantz lets you set multiple powered subs separately inside the receiver. Onkyo brings a suitable visiting HDMI source to the front. The useful feature depends on what you actually connect and how you can reach it.
Winner by situation
Marantz supplies separate level and distance entries for two to four powered subs with matching Speaker Layout. For four, output 4 must remain a sub output. Rear HDMI access or a tested extension must fit the source routine. Onkyo’s second socket cannot satisfy this control requirement, which is not proof of better bass.
Onkyo avoids rear access for a main-room source if the front flap and plug are reachable and one or two powered subs can share one receiver setting. Verify the source, cable and display. Front 4K60 needs 8-bit YCbCr 4:2:0, with no 4K120, 8K or HDMI Zone 2. A suitable tested Marantz rear extension can remove the practical gap.
With compatible source-to-display connections, the correct speaker assignment and a ventilated installation, both cover this plan. Separate sub settings and a front socket do not decide it. Compare the other functions you actually use and current complete offers. No equal sound quality or lower price is assumed.
Marantz has the separate settings but only rear HDMI inputs. Onkyo has front HDMI within its signal and main-room limits, but shared sub settings. Neither supplies both unchanged. A tested rear extension changes the access requirement rather than adding a front socket.
Marantz has no front HDMI input. Onkyo’s HDMI Zone 2 accepts only rear HDMI IN 1 to 3 with two-channel PCM and Zone 2 HDMI set to Use. Its front AUX camera route cannot meet this requirement. Reconnecting the source at a compatible rear input changes the plan.
Both need an external two-channel power amplifier and the documented assignment for 7.1.4. Neither the subwoofer socket count nor the presence of front HDMI adds powered main-speaker channels. A 5.1.4 plan is the supported all-in-one alternative if fewer ear-level speakers are acceptable.
What matters in practice
Two differently placed powered subs may need different receiver level and distance settings. CINEMA 50 provides them with matching Speaker Layout, while Onkyo’s second socket repeats the shared signal and setting. With one sub, or a verified external processor already handling adjustment, the receiver advantage can disappear. Rear HDMI access or a tested extension must still suit you. No smoother-bass result is established.
Both manuals explicitly describe their subwoofer outputs. Marantz also documents Standard and Directional routing, and requires Standard for Audyssey Sub EQ HT. Its distance display changes to milliseconds under Dirac Live. Those distinctions prevent separate settings from becoming a claim about equivalent or superior correction methods.
A camera that comes out occasionally can avoid a reach behind Onkyo. That benefit needs an accessible flap and plug, a main-room route and one shared receiver setting for one or two powered subs. The source, cable and display must qualify. Front 4K60 requires 8-bit YCbCr 4:2:0, without 4K120, 8K or HDMI Zone 2. A tested Marantz rear-input extension can erase the access difference.
Onkyo explicitly documents a front camera connection and AUX selection. Its front-input format table is narrower than the rear-input table, and its HDMI Zone 2 instructions accept only rear inputs 1 to 3. This is an access benefit under specific signal and routing conditions, not evidence of universal plug-and-play compatibility.
Neither meets both requirements if separate receiver sub settings and built-in front HDMI are mandatory. A verified rear-input extension relaxes the access requirement for Marantz. Accepting shared sub settings relaxes the calibration requirement for Onkyo, whose front format and main-room restrictions remain. If neither compromise works, change the shortlist. Separately, both need an external two-channel amplifier for 7.1.4.
The two requirements can change independently. An extension changes access, while a shared sub setting changes the calibration plan. Neither substitution is assumed to be acceptable or included. The manuals separately document the external-amplifier requirement for eleven main-room channels.
Check a documented speaker layout against HDMI sources and external-amplifier plans.
Supports your setup
Supports 5.1.2 using the receiver's own amplifiers. Connects 3 HDMI devices, including 1 at 4K/120Hz.
Supports your setup
Supports 5.1.2 using the receiver's own amplifiers. Connects 3 HDMI devices, including 1 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 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.

Marantz, CINEMA 50
CINEMA 50 provides separate level and distance settings for up to four connected powered subs with the matching Speaker Layout. HDMI sources connect at the rear. A suitable tested extension can make a temporary source easier to reach.

Onkyo, TX-RZ50
TX-RZ50 has a front AUX HDMI input behind a flap, but its two sub sockets share one signal and receiver setting. Front 4K60 requires 8-bit YCbCr 4:2:0, excludes 4K120 and 8K, and cannot feed HDMI Zone 2.
Meaningful differences
| What changes | Marantz CINEMA 50 | Onkyo TX-RZ50 | Why it matters |
|---|---|---|---|
| Five ear-level speakers and four heights | Documented 5.1.4 layout using its built-in amplifiers | Documented 5.1.4 layout using its built-in amplifiers | Both can serve this main-room plan with the documented speaker connections and assignment. Neither powers a 7.1.4 system by itself. That expansion needs an external two-channel amplifier. |
| Setting up multiple powered subwoofers | Separate level and distance settings for Subwoofer 1 to 4 | Two sockets carrying the same signal, with one subwoofer setup entry | Marantz can give each connected sub its own receiver setting when the selected Speaker Layout matches. Two Onkyo sockets do not provide two separately adjustable receiver outputs. This is a control difference, not a measured bass result. |
| Connecting a visiting HDMI source | HDMI inputs are on the rear | AUX INPUT HDMI behind the front flap | Onkyo avoids reaching behind the receiver when the front is accessible. Marantz can lose that practical disadvantage if an appropriate rear-input extension already reaches the visitor and works with the required signal. |
| Video formats for the front connection | No front HDMI input | 4K60 only at 8-bit YCbCr 4:2:0 | Do not move a 4K120 or 8K source to Onkyo’s front jack expecting the rear-input capability. Its listed 4K30 options include 8-bit RGB, but 4K60 RGB is outside the front-port table. The source, cable and display all need the chosen format. |
| Sending that front source to another room | No front HDMI input to route | Front AUX is excluded from HDMI Zone 2 | The convenient camera connection is a main-room benefit. Onkyo’s HDMI Zone 2 route accepts only rear HDMI IN 1 to 3 and requires two-channel PCM audio. A second display in the main room uses a different output setting. |
| Room around the receiver | Needs ventilation and rear cable access | Needs ventilation, rear cable access and front-flap space for AUX | A chassis fitting a shelf is not enough. Leave the ventilation space required by the supplied installation instructions and room for cables. A closed cabinet door or obstructed flap can remove the Onkyo access benefit. |
What you give up
Recommendation switch
Choose Marantz CINEMA 50. Multiple powered subs favor Marantz when separate level and distance settings are genuinely needed. Set Speaker Layout for two to four connected subs and keep output 4 for a sub if using all four. Rear HDMI access or a tested extension must suffice. The settings alone establish no bass-quality improvement.
Choose Onkyo TX-RZ50. Frequent main-room source changes favor Onkyo if its front flap and plug remain accessible and shared settings suffice for one or two powered subs. The source, cable and display must match: front 4K60 needs 8-bit YCbCr 4:2:0, with no 4K120, 8K or HDMI Zone 2.
Choose neither. Neither combines them. Marantz offers separate settings with rear HDMI. Onkyo offers front AUX with shared sub settings and restricted formats and routing. Consider another model unless one of those requirements can change.
Choose neither. Marantz has no front HDMI. Onkyo’s front table excludes 4K120 and 8K, and HDMI Zone 2 uses only rear inputs 1 to 3. Choose a suitable rear path or another documented connection plan.
Choose neither. Both require an external two-channel amplifier for that layout. Choose a receiver that powers all eleven main channels, or change the speaker plan to a documented self-powered layout such as 5.1.4.
What matters in practice
First confirm the speaker plan and a ventilated installation. Then decide whether separate receiver settings for your subs or an accessible, compatible visiting-source connection solves the real problem.
What the facts say
Useful conclusions from the current AV receivers comparison, followed by the checked facts used to reach them.
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Marantz CINEMA 50 |
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| Onkyo TX-RZ50 |
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Ready to choose?
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CINEMA 50 gives two to four powered subs separate level and distance settings with matching Speaker Layout. Output 4 must remain a sub output when all four are used. Rear HDMI access or a suitable tested extension must cover visiting sources. Separate settings do not prove better bass or independent optimization.
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TX-RZ50 eases main-room visiting-source access if its front flap and plug fit and one or two powered subs can share one receiver setting. The source, cable and display must support the front format: 4K60 requires 8-bit YCbCr 4:2:0. It excludes 4K120, 8K and HDMI Zone 2.
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