Sonos Arc Ultra + Sub 4 + Era 300 Speakers (Complete Home Theater)
The complete Sonos home theater — nothing else comes close.
The Sonos Arc Ultra soundbar paired with the Sub 4 subwoofer and Era 300 surround speakers delivers a full Dolby Atmos home theater experience with true spatial audio, thunderous bass, and wireless surround sound — no receiver required.
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What We Think
The Sonos Arc Ultra, Sub 4, and Era 300 together form the most capable wireless home theater system you can buy without a dedicated AV receiver. The Arc Ultra alone is exceptional — 14 drivers including up-firing tweeters create a wide, enveloping soundstage with genuine height information in Dolby Atmos content. But adding the Sub 4 and Era 300 speakers transforms it into something else entirely. The Sub 4 uses dual force-cancelling woofers to deliver bass that you feel in your chest without the cabinet vibration that plagues cheaper subwoofers. The Era 300 surround speakers each contain their own up-firing driver, so you get Atmos height information from the sides and rear as well as the front — creating a true three-dimensional sound bubble around the listening position. Everything connects wirelessly and the Sonos app handles Trueplay room calibration automatically. The result is a system that sounds like a professionally installed home theater but sets up in an afternoon with no wires, no receiver, and no complicated configuration.
This system is for serious home theater enthusiasts who want the best wireless Dolby Atmos experience available. It is ideal for dedicated media rooms and open-plan living spaces. Not for buyers looking for a simple soundbar upgrade — this is a full system investment.
What We Love
- True Dolby Atmos spatial audio with height channels from Arc Ultra
- Sub 4 adds deep, room-filling bass that the soundbar alone cannot match
- Era 300 speakers create genuine wireless surround sound — no wires
- All three units connect wirelessly via Trueplay tuning
- Seamless Sonos app control for the entire system
- Alexa and Google Assistant built into Arc Ultra
Worth Noting
- Significant investment — this is a full home theater system price
- Requires Sonos ecosystem — does not mix with other brands
- Sub 4 and Era 300 are large — need space planning
How People Actually Use It
The Arc Ultra + Sub 4 + Era 300 delivers a genuine cinema experience at home. Dolby Atmos content sounds exactly as the director intended — with height, depth, and bass that moves you.
The Era 300 speakers fill the room with music from every direction. Stereo recordings sound wider and more immersive than any traditional speaker placement.
No speaker cables, no receiver, no clutter. The entire system runs wirelessly over WiFi — the only cable is HDMI eARC from the Arc Ultra to your TV.
Alexa and Google Assistant built into the Arc Ultra make it the voice control center for your living room. Control music, movies, smart home devices, and more hands-free.
The Sonos Arc Ultra + Sub 4 + Era 300 is the most complete wireless home theater system available. If you want true Dolby Atmos with real surround sound and thunderous bass — without a single speaker wire — this is the system to buy.
The Sonos Arc Ultra + Sub 4 + Era 300 is the right system for buyers who want the best wireless home theater experience available and are willing to invest in it. Once you hear it, you will not want to go back.
vs. The Alternatives
| Pan | Price |
|---|---|
| Sonos Arc Ultra + Sub 4 + Era 300 Speakers (Complete Home Theater) This | — |
| Bose Smart Soundbar 900 | Similar |
| Samsung HW-Q990D | Higher |
What Our Editors Found
Editorial observations based on hands-on research and testing notes from the Best Homes Finds team.
Sold my AV receiver after setting this up
I had a full 7.1 wired system for years and was skeptical anything wireless could match it. The Arc Ultra + Sub 4 + Era 300 proved me wrong. The bass from the Sub 4 is deeper and cleaner than my old subwoofer, and the Era 300 surrounds with their up-firing drivers create height effects I never had before. Setup took two hours. My old system took two days.
The complete package — nothing missing
I bought the Arc Ultra first and it was already incredible. Added the Sub 4 and Era 300 a month later and the difference is night and day. Movies feel like the cinema. Music fills the entire room. The Trueplay calibration is genuinely impressive — it tuned itself to our oddly shaped living room perfectly.
Best audio investment I have made
The system sounds phenomenal and the wireless setup is genuinely impressive. My only note is that the Sub 4 is large — make sure you have space planned before ordering. Once it is in place and calibrated the bass is extraordinary. Docking one star purely for the price, which is significant, but honestly worth it.
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Frequently Asked Questions
Do all three units connect wirelessly?
Yes. The Arc Ultra connects to your TV via HDMI eARC. The Sub 4 and Era 300 speakers connect to the Arc Ultra wirelessly over your home WiFi network — no speaker cables required.
Does this support true Dolby Atmos?
Yes. The Arc Ultra has up-firing drivers for height channels, and the Era 300 surround speakers also have up-firing drivers. Together they create a full three-dimensional Atmos soundstage with height information from front, sides, and rear.
Can I add to the system later?
Yes. You can start with just the Arc Ultra and add the Sub 4 and Era 300 at any time. All Sonos products are designed to work together and the app handles the integration automatically.
Does it work with any TV?
The Arc Ultra connects via HDMI eARC, which is available on most TVs made after 2019. For older TVs without eARC, an optical adapter is available separately.
Ready to Buy?
Get the Sonos Arc Ultra + Sub 4 + Era 300 Speakers (Complete Home Theater) on Amazon — fast shipping, easy returns.
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