Sonos Arc Ultra Soundbar vs TCL Q85K
Quick Verdict
For buyers who want a single soundbar with the highest channel count and smart dialogue features, the Sonos Arc Ultra is the better choice. It offers 9.1.4 Atmos, AI speech enhancement, Trueplay, and broad streaming. For buyers who want an included wireless subwoofer and gaming friendly HDMI 2.1 pass-through with DTS:X support, the TCL Q85K is the better value. The Q85K includes a wireless 7 inch dual driver sub and solves the Sonos main con. Choose the Sonos for ecosystem and dialogue. Choose the TCL for bass and gaming.
| Spec | Sonos Arc Ultra Soundbar | TCL Q85K |
|---|---|---|
| Channels | 9.1.4 | 7.1.2 |
| Drivers | Not published in listing | Dedicated center channel, up-firing Atmos drivers, 7-inch dual-driver wireless subwoofer, total driver count not published |
| Power | Not published in listing | Not published in listing |
| Subwoofer | No separate subwoofer included; compatible with optional Sonos Sub models | Wireless, 7-inch dual-driver |
| Dolby Atmos and DTS | Dolby Atmos yes; DTS and DTS:X not stated in listing | Dolby Atmos, DTS:X |
| HDMI eARC and inputs | One HDMI eARC port; no additional HDMI inputs stated | HDMI 2.1 eARC with 4K 144Hz pass-through, input count and type not published |
| Wireless and streaming | WiFi, Bluetooth, Apple AirPlay 2, Spotify Connect, Sonos multi-room | Apple AirPlay 2, Google Cast, no Bluetooth stated |
| Dimensions | Not published in listing | Not published in listing |
| Remote and app | Sonos app, TV remote control, touch controls, Sonos Voice Control, Alexa | AI Sonic Auto Room Calibration included, remote and app not published |
| Included accessories | Not published in listing | Wireless subwoofer included, other accessories not published |
Sound Quality
The Sonos Arc Ultra scores 27 out of 30 for sound quality and the TCL Q85K scores 24 out of 30. The Sonos lists a 9.1.4 channel layout, while the TCL lists a 7.1.2 layout. Both soundbars do not publish their total driver counts or power output, so the comparison relies on the listed features.
The Sonos Arc Ultra emphasizes clear dialogue with AI driven Speech Enhancement and Trueplay tuning that adapts to the room. The TCL Q85K counters with a dedicated center channel, a Dialog Enhancer, and Bang & Olufsen tuned beam-forming technology. Neither model lists driver sizes, so physical audio components are unknown. The Sonos higher channel count may create a more immersive front stage, but the TCL dedicated center could improve vocal clarity.
Both soundbars have published pros that focus on dialogue and Atmos. The Sonos Arc Ultra has a slight edge in the listing because of its 9.1.4 channels and Trueplay, which the TCL does not list. However, the TCL Q85K includes a wireless subwoofer that is not part of the sound quality section but affects overall perceived sound. Buyers who value channel count and room correction may prefer the Sonos, while those who favor a dedicated center and included bass may lean toward the TCL.
Surround, Atmos and Audio Formats
The Sonos Arc Ultra supports Dolby Atmos, but the listing does not state DTS or DTS:X support. The TCL Q85K supports both Dolby Atmos and DTS:X. This gives the TCL a clear advantage for DTS encoded content, which is common on many Blu-ray discs and some streaming titles.
The Sonos Ark Ultra has a 9.1.4 channel layout, which suggests up-firing drivers for height effects, but the listing does not explicitly describe the drivers. The TCL Q85K lists up-firing Atmos drivers as part of its 7.1.2 setup. The TCL also has a dedicated center channel and beam-forming technology, while the Sonos relies on AI speech enhancement and Trueplay tuning.
For audio formats, the TCL Q85K is more complete because it includes DTS:X. The Sonos Arc Ultra does not list DTS support. Both soundbars have room calibration features, with Sonos Trueplay and TCL AI Sonic Auto Room Calibration. If DTS content matters to you, the TCL is the safer choice.
Subwoofer and Bass
The Sonos Arc Ultra does not include a separate subwoofer. It is compatible with optional Sonos Sub models for added low end. The TCL Q85K includes a wireless 7 inch dual driver subwoofer in the box. This gives the TCL an immediate advantage for bass response without additional purchases.
The Sonos listing does not publish driver sizes or power output, so its built in bass capability is unknown. The TCL subwoofer has two 7 inch drivers, which suggests strong low frequency output, but the listing also omits power output. The Sonos cons list no separate subwoofer included as a drawback, while the TCL pros list the wireless subwoofer as a key feature.
Buyers who want thumping bass out of the box should choose the TCL Q85K. Buyers who already own a Sonos Sub or plan to add one later may be satisfied with the Sonos Arc Ultra. The TCL listing does not state subwoofer power, so exact volume levels are not published.
Connectivity and TV Setup
The Sonos Arc Ultra has one HDMI eARC port and no additional HDMI inputs stated. The TCL Q85K has HDMI 2.1 eARC with 4K 144Hz pass through, which is useful for gamers and high refresh rate TVs. The number of HDMI inputs on the TCL is not published, so passthrough is the main differentiator.
For wireless connectivity, the Sonos supports WiFi, Bluetooth, Apple AirPlay 2, Spotify Connect, and Sonos multi-room. The TCL supports Apple AirPlay 2 and Google Cast, but no Bluetooth is stated. The Sonos has Bluetooth and Spotify Connect, while the TCL has Google Cast. Both offer AirPlay 2.
Setup for the Sonos uses a single HDMI eARC cable, and it can be controlled by a TV remote. The TCL does not list setup details, but HDMI eARC is standard. For gaming, the TCL 4K 144Hz pass through is a clear advantage because the Sonos does not list any pass through specification.
Features, Apps and Voice Control
The Sonos Arc Ultra offers the Sonos app, TV remote control, touch controls, Sonos Voice Control, and Alexa. This gives it a full suite of voice assistants and app based control. The TCL Q85K lists AI Sonic Auto Room Calibration included, but the remote and app support are not published. No voice assistants are mentioned for the TCL.
Both soundbars have room calibration. The Sonos uses Trueplay tuning, and the TCL uses AI Sonic Auto Room Calibration. The Sonos also has AI driven Speech Enhancement, while the TCL has a Dialog Enhancer. Sonos multi-room streaming is a big feature for existing Sonos users, and the TCL does not mention multi-room.
For app support, the Sonos has a well known app and voice control, while the TCL listing lacks details. The TCL has AirPlay 2 and Google Cast for streaming, but no Bluetooth or voice control. Buyers who want hands free control should choose the Sonos. The TCL appears to rely on TV remote or basic app control, but the listing does not confirm.
Design and Fit Under a TV
Neither the Sonos Arc Ultra nor the TCL Q85K lists physical dimensions. This makes it impossible to compare their sizes or how they fit under a specific TV from the listings alone. The Sonos scores 13 out of 15 for design and TV fit, while the TCL scores 10 out of 15, likely due to missing specifications.
The Sonos Arc Ultra includes touch controls, which suggests a premium finish. The TCL does not list any physical controls. The TCL includes a separate wireless subwoofer, which requires additional space, while the Sonos is a single bar. The Sonos single cable setup may fit neatly under a TV if space allows.
Because dimensions are not published, buyers should verify size elsewhere before purchase. The lower design score for the TCL stems from missing details, not necessarily from poor design. The Sonos appears more polished based on the listed touch controls and single cable setup.
Who Should Buy It
The Sonos Arc Ultra is best for TV and movie listeners who want a 9.1.4 Dolby Atmos experience from a single bar and clear dialogue. It is especially appealing to existing Sonos users who can expand with a Sonos Sub or Era 300 rear speakers. The TCL Q85K is best for buyers who want an upper mid range Dolby Atmos soundbar with a wireless subwoofer and gaming friendly HDMI 2.1 pass through without separate rear speakers.
The Sonos Arc Ultra may not suit buyers who need an included subwoofer, DTS decoding, or a physical remote, or who want a budget option. The TCL Q85K may not suit buyers who need exact specifications like driver count, power output, dimensions, and HDMI input count before making a purchase.
In short, the Sonos is for dialogue focused streaming and Sonos ecosystem users, while the TCL is for bass lovers and gamers who want DTS:X and an included subwoofer.
The Deciding Question
The main deciding question is whether you need an included subwoofer and DTS:X support versus a higher Atmos channel count and the Sonos ecosystem. If you want a subwoofer out of the box and DTS:X decoding, the TCL Q85K is the clear choice. If you value 9.1.4 channels, Trueplay tuning, voice control, and multi-room, the Sonos Arc Ultra wins.
Another question is gaming use. The TCL Q85K lists HDMI 2.1 eARC with 4K 144Hz pass through, which is a significant advantage for console or PC gamers. The Sonos Arc Ultra lists only one HDMI eARC port with no pass through specification, making it less certain for high refresh rate gaming.
So the decision hinges on bass, DTS, and gaming versus dialogue, ecosystem, and voice control. Both are strong upper mid range soundbars, but their strengths target different types of buyers.
Who Should Buy Which
Buy the Sonos Arc Ultra if you already own Sonos speakers, want the highest Atmos channel count of the two, rely on voice assistants like Alexa, and do not mind adding a subwoofer later. It is also the better pick for dialogue heavy TV and movies due to AI speech enhancement and Trueplay.
Buy the TCL Q85K if you want a complete sound system with a wireless subwoofer, DTS:X support, and gaming friendly HDMI 2.1 4K 144Hz pass through from day one. It is the stronger value for bass lovers and gamers, and the Bang & Olufsen tuning with a dedicated center channel is a real benefit.
Both are upper mid range options, but the TCL includes more hardware while the Sonos offers a more refined ecosystem and higher channel count. Choose based on which set of features matters more for your daily use.
Sonos Arc Ultra Soundbar
Pros
- 9.1.4 Dolby Atmos channels for immersive sound.
- AI driven Speech Enhancement for clear dialogue.
- Broad streaming including AirPlay 2 and Spotify Connect.
- Trueplay tuning adjusts sound to room.
- Works with Sonos Sub and Era 300 for expandable surround.
- Single cable HDMI eARC setup.
Cons
- No separate subwoofer included.
- DTS support not stated.
- Driver sizes and power not published.
- Only one HDMI input, passthrough not specified.
- Upper mid-range price for a soundbar without a sub.
TCL Q85K
Pros
- 7.1.2-channel Dolby Atmos and DTS:X support
- Audio tuned by Bang & Olufsen with beam-forming technology
- Dedicated center channel with Dialog Enhancer
- HDMI 2.1 eARC with 4K 144Hz pass-through for gaming
- Wireless 7-inch dual-driver subwoofer included
- Apple AirPlay 2 and Google Cast built in
Cons
- Total driver count and power output not published
- Physical dimensions not listed
- Number of HDMI inputs not specified
- No Bluetooth mention in the listing
- Remote and app support details missing
Who Should Buy Each
Sonos Arc Ultra Soundbar
- Existing Sonos multi-room users who want to add a TV bar.
- Apartment or living room users who prefer no separate subwoofer.
- Listeners who prioritize dialogue clarity and Atmos from one unit.
- Streamers who use AirPlay 2, Spotify Connect, or Bluetooth often.
TCL Q85K
- TCL TV owners who can use ChorusSound Integration
- Gamers needing 4K 144Hz pass-through and eARC
- Those who want a simplified Atmos setup with wireless sub
- Buyers who prefer AirPlay 2 or Google Cast streaming
Quick Decision Guide
| If you want an included wireless subwoofer | Choose TCL Q85K |
| If you need DTS:X support | Choose TCL Q85K |
| If you want 9.1.4 channels and Trueplay tuning | Choose Sonos Arc Ultra Soundbar |
| If you want voice control with Alexa and Sonos Voice | Choose Sonos Arc Ultra Soundbar |
| If you game at 4K 144Hz and need HDMI 2.1 pass through | Choose TCL Q85K |
FAQ
About This Comparison
Mandrillis Team
The Mandrillis editorial team researches and compares audio and music gear using manufacturer documentation, verified specs and real buyer feedback, so you can make a confident purchase without wading through marketing claims.
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