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Marantz Cinema 50 vs CINEMA 40
Marantz's upper rungs — which should you buy?
The short answer
Buy the Marantz Cinema 50 for most rooms — the topology that defines this tier (9.4, four independent subs, XT32) is identical on both sheets. The CINEMA 40's honest case is an amplifier rated higher under a stricter THD test plus more inputs and triggers — a custom-install case more than a listening one.
As tracked by Home Theater Builder: the Marantz Cinema 50 tracks at $2,000; the Marantz CINEMA 40 at $3,800. How we verify this data → Two 9.4 receivers from the same family, same XT32 correction, same four independent sub outs. The step-up money buys an amplifier measured under a harder test — and more back-panel plumbing.
Specifications · side by side · per-field provenance
● SOURCE-TRACKED| Spec | Marantz Cinema 50 | Marantz CINEMA 40 |
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| Price | $2,000 | $3,800 |
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| Brand | Marantz | Marantz |
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| Channel Config | 9.4 | 9.4 |
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| Main Channels | 9 | 9 |
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| Processing Channels | 11 | 11 |
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| Sub Pre Outs | 4 | 4 |
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| Zone 2 Capable | Yes | Yes |
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| Zone 3 Capable | No | Yes |
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| Watts Per Channel 8ohm | 110 | 125 |
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| THD Percent | 0.08 | 0.05 |
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| Power Measurement Channels Driven | two channels driven | two channels driven |
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| Impedance Range | 4 – 16 Ω/ohms | 4 – 16 Ω/ohms |
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| Impedance Min Ohms | 4 | 4 |
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| Impedance Max Ohms | 16 | 16 |
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| Dolby Atmos | Yes | Yes |
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| Dts X | Yes | Yes |
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| Auro 3d | Yes | Yes |
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| Imax Enhanced | Yes | Yes |
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| Room Correction System | Audyssey MultEQ XT32 | Audyssey MultEQ XT32 |
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| Measurement Mic Included | Yes | Yes |
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| HDMI Inputs | 6 | 7 |
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| HDMI Outputs | 3 | 3 |
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| HDMI Max Bandwidth Gbps | 40 | 40 |
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| HDMI Earc Port Count | 1 | 1 |
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| HDR Support | HDR10, HLG, Dolby Vision, HDR10+, Dynamic HDR | HDR10, HLG, Dolby Vision, HDR10+, Dynamic HDR |
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| ALLM Support | Yes | Yes |
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| Phono Input | Yes | Yes |
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| Wifi | Yes | Yes |
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| Bluetooth | Yes | Yes |
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| Airplay2 | Yes | Yes |
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| Heos | Yes | Yes |
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| Ip Control | Yes | Yes |
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| Streaming Services | Spotify Connect, TuneIn, Pandora, Deezer, Amazon Music HD | Spotify Connect, TuneIn, Pandora, Amazon Music HD, Deezer |
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| Trigger Outputs Count | 1 | 3 |
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| Form Factor | full size | full size |
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| Width Inches | 17.4 | 17.3 |
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| Height Inches | 6.5 | 6.5 |
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| Depth Inches | 15.5 | 15.8 |
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| Weight Lbs | 24 | 32.4 |
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| Power Consumption W | 680 | 710 |
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| Max Passthrough Resolution | not stated | 8K 60 |
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Shaded rows differ · green dot = lab-measured · amber = manufacturer-verified · blue = retailer/community-reported · grey = estimated · “not stated” means exactly that
Reading the numbers honestly
The power figures differ on two axes at once, in the step-up's favor: the CINEMA 40's curated rating is 125W at 0.05% THD against the Cinema 50's 110W at 0.08%, both at 8Ω with two channels driven. Rated higher under the stricter distortion threshold, its advantage is at least what's printed — though still ~0.6 dB. Elsewhere the 40 states seven HDMI inputs to the 50's six and three 12V trigger outputs to the 50's one. Topology, correction, and the 4–16Ω rating are identical stated fields.
Compatibility · computed, not written
Checked against a bookshelf that dips to a stated 3.5Ω like the KEF LS50 Meta: KEF LS50 Meta
Can the Marantz Cinema 50 drive the KEF LS50 Meta?
Marantz Cinema 50 states a 4Ω-minimum rating; the KEF LS50 Meta dips to a stated 3.5Ω minimum, a little below that floor. Most receivers handle a marginal dip at normal volumes — it's worth watching only at very high output on an entry-level unit.
Can the Marantz CINEMA 40 drive the KEF LS50 Meta?
Marantz CINEMA 40 states a 4Ω-minimum rating; the KEF LS50 Meta dips to a stated 3.5Ω minimum, a little below that floor. Most receivers handle a marginal dip at normal volumes — it's worth watching only at very high output on an entry-level unit.
Computed from the catalog's normalized fields — the same fields the builder's compatibility engine reads. A missing field reads as "can't check", never as a pass.
Check either one against your own build →Gaming & connectivity · answered from the spec sheets
Can the Marantz Cinema 50 and Marantz CINEMA 40 pass 4K/120 through?
The Marantz Cinema 50 states 40 Gbps HDMI bandwidth — enough for full 4K/120; the Marantz CINEMA 40 states 40 Gbps HDMI bandwidth — enough for full 4K/120.
The verdict
Buy the Marantz Cinema 50 for most rooms — the topology that defines this tier (9.4, four independent subs, XT32) is identical on both sheets. The CINEMA 40's honest case is an amplifier rated higher under a stricter THD test plus more inputs and triggers — a custom-install case more than a listening one.
Most 9.4 roomsMarantz Cinema 50 — Identical channel topology, sub management, and correction in stated fields — the core capability doesn't move.
Racks, projectors, motorized gearMarantz CINEMA 40 — 3 stated trigger outputs vs 1, and 7 HDMI inputs vs 6.
Amplifier margin on paperMarantz CINEMA 40 — 125W at 0.05% THD vs 110W at 0.08% — higher AND stricter, though ~0.6 dB.
What our normalized data adds
NOT ON THE SPEC SHEETS- The step-up's power figure wins on both axes: curated 125W at 0.05% THD vs 110W at 0.08%, same 8Ω/2ch context — higher rated under the harder test.
- Platform parity in stated fields: both 9.4 with 11-channel processing, 4 independent sub pre-outs, Audyssey MultEQ XT32, and 4–16Ω ratings.
- Custom-install plumbing is the visible difference: 3 vs 1 stated trigger outputs, 7 vs 6 HDMI inputs.
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