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Yamaha RX-V4A vs RX-V6A
Yamaha's entry ladder — is the RX-V6A step worth it?
The short answer
Buy the Yamaha RX-V6A if there's any chance you'll want Atmos, a phono input, or a second zone — every one of those is a stated FALSE on the RX-V4A's own sheet, not an omission. The V4A is only right when 5.1 (or stereo plus sub) is genuinely the end state.
The most consequential ladder step in Yamaha's range, because it isn't about watts: the RX-V4A is a 5.2 receiver whose sheet states NO Atmos, and the RX-V6A is the 7.2 that adds it.
Specifications · side by side · per-field provenance
● SOURCE-TRACKED| Spec | Yamaha RX-V4A | Yamaha RX-V6A |
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| Price | $500 | $646 |
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| Brand | Yamaha | Yamaha |
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| Channel Config | 5.2 | 7.2 |
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| Main Channels | 5 | 7 |
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| Processing Channels | 5 | 7 |
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| Sub Pre Outs | 2 | 2 |
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| Zone 2 Capable | No | Yes |
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| Watts Per Channel 8ohm | 80 | 100 |
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| Watts Per Channel 6ohm | 80 | not stated |
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| THD Percent | 0.06 | 0.06 |
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| Power Measurement Channels Driven | two channels driven | two channels driven |
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| Impedance Range | 8 Ω (U.S.A./Canada; 6 Ω switchable) | Front: 4 Ω or more; Other: 6 Ω or more (default 8 Ω) |
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| Impedance Min Ohms | 6 | 4 |
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| Impedance Max Ohms | 8 | 8 |
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| Dolby Atmos | No | Yes |
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| Dts X | No | Yes |
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| Room Correction System | YPAO | YPAO |
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| HDMI Inputs | 4 | 7 |
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| HDMI Outputs | 1 | 1 |
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| HDMI Version | 2.1 | not stated |
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| HDMI Max Bandwidth Gbps | 24 | 24 |
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| HDMI Earc Port Count | 1 | 1 |
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| Max Passthrough Resolution | 8K 60 | 8K 60 |
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| HDR Support | HDR10, Dolby Vision, HLG, HDR10+ | HDR10, Dolby Vision, HLG |
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| VRR Passthrough | Yes | Yes |
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| ALLM Support | Yes | Yes |
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| Phono Input | No | 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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| Musiccast | Yes | Yes |
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| Trigger Outputs Count | 0 | 1 |
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| Width Inches | 17.1 | 17.1 |
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| Height Inches | 6.8 | 6.8 |
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| Depth Inches | 14.9 | 14.9 |
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| Weight Lbs | 19.4 | 21.6 |
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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 RX-V4A states Dolby Atmos and DTS:X as FALSE — an honest, stated no, not a gap. The RX-V6A states both as TRUE with seven amplified channels to place real height speakers. Power is like-for-like within the house style: 80W vs 100W, both at 8Ω, two channels driven, 0.06% THD. The stated small print stacks the same way: the V4A states zone 2 = FALSE, phono = FALSE, and zero trigger outputs; the V6A states yes to all three. Both share Yamaha's stated 24 Gbps HDMI bandwidth ceiling in our curated data.
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 Yamaha RX-V4A drive the KEF LS50 Meta?
Yamaha RX-V4A states a 6Ω-minimum rating, and the KEF LS50 Meta dips to a stated 3.5Ω minimum — well below that floor. By its own published spec this receiver is not rated for a load like this.
Can the Yamaha RX-V6A drive the KEF LS50 Meta?
Yamaha RX-V6A 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 Yamaha RX-V4A and Yamaha RX-V6A pass 4K/120 through?
The Yamaha RX-V4A states 24 Gbps HDMI bandwidth, below the ~40 Gbps full 4K/120 needs; the Yamaha RX-V6A states 24 Gbps HDMI bandwidth, below the ~40 Gbps full 4K/120 needs.
The verdict
Buy the Yamaha RX-V6A if there's any chance you'll want Atmos, a phono input, or a second zone — every one of those is a stated FALSE on the RX-V4A's own sheet, not an omission. The V4A is only right when 5.1 (or stereo plus sub) is genuinely the end state.
Any Atmos ambitionYamaha RX-V6A — The V4A states Atmos/DTS:X = FALSE; the V6A states both TRUE with 7 amplified channels.
Turntable or zone 2Yamaha RX-V6A — Phono and zone 2 are stated FALSE on the V4A, stated TRUE on the V6A.
A committed 5.1-forever roomYamaha RX-V4A — Like-for-like 80 vs 100W (~1 dB) is the only real concession, same 0.06% THD context.
What our normalized data adds
NOT ON THE SPEC SHEETS- The RX-V4A's sheet states Dolby Atmos = FALSE, DTS:X = FALSE, zone 2 = FALSE, phono = FALSE, and 0 trigger outputs — five stated noes our three-state data records as facts, all of which the RX-V6A states as yes.
- Like-for-like power: 80W vs 100W, both stated at 8Ω / two channels driven / 0.06% THD — about 1 dB.
- Both share a stated 24 Gbps HDMI bandwidth in curated data — the step-up does NOT buy full 40 Gbps HDMI 2.1; neither is the pick for that.
- 5 vs 7 amplified channels and 5 vs 7 curated processing channels — the fork between 5.1-forever and a 5.1.2 Atmos layout.
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