If you've been searching for the best Dolby Atmos soundbar system in India — one that genuinely fills a room with three-dimensional, object-based audio without a tangle of wires — the Sonos Arc Ultra Ultimate Immersive Set is exactly what you've been looking for. This is not a simple soundbar upgrade. It is a complete, wireless home theater system designed to replace a traditional 5.1 or 7.1 speaker setup with something far more elegant.
At 8mm.in, we've been designing and installing premium home theaters since 1990. In that time, we've heard a lot of systems claim to deliver cinematic sound. The Sonos Arc Ultra set is one of the rare few that actually delivers — and then some.
What's in the Sonos Arc Ultra Immersive Set?
The Sonos Arc Ultra Immersive Set is a four-component wireless home theater package:
• Sonos Arc Ultra Soundbar × 1
• Sonos Sub (Gen 4) × 1
• Sonos Era 300 Surround Speakers × 2
Together, they create a true 5.1.4-channel Dolby Atmos setup — with height channels, front width, and deep bass all handled wirelessly. You get an immersive sound stage that wraps around and above you, exactly the way content creators intended.
Sonos Arc Ultra Soundbar — Redefining What a Soundbar Can Do
The Arc Ultra is the centrepiece of this system, and it earns that position. Sonos redesigned the Arc Ultra around a new Sound Motion driver technology — a compact, high-excursion transducer that moves more air in a smaller space. The result is bass extension and clarity that you would not expect from a soundbar enclosure.
Phased Array Spatial Audio
The Arc Ultra uses advanced phased-array processing to create five horizontal audio channels from a single bar. This technology spatially separates the left, centre, right, left wide, and right wide channels — giving voices pinpoint accuracy in the centre while music and effects sweep naturally across the room. When you're watching a film, you'll hear sound move through space rather than emit from a single point.
Dolby Atmos & DTS:X Height Channels
The Arc Ultra features dedicated upward-firing drivers for Dolby Atmos height reflections. Rain sounds fall from the ceiling. Helicopter blades sweep overhead. Aircraft pass from front to back. With a reflective ceiling (standard in most Indian homes), the height layer is convincing and consistent.
TrueHD Atmos via HDMI eARC
For those of us who care about signal purity, the Arc Ultra supports Dolby TrueHD Atmos passthrough via its HDMI eARC connection. This means if your TV or AV source sends a lossless Atmos bitstream, the Arc Ultra decodes it at full quality — nothing is compressed or downsampled. This is a significant differentiator from soundbars that only support lossy Atmos.
Sonos Sub (Gen 4) — Bass That You Feel
No home theater sounds complete without bass that moves you physically. The Sonos Sub Gen 4 brings exactly that. Two opposing drivers cancel out vibration from the chassis while maximising low-frequency output — meaning clean, tight, powerful bass with zero rattle.
The Sub 4 pairs wirelessly to the Arc Ultra and calibrates itself automatically using Sonos Trueplay technology. Whether you're watching an action film with explosive effects or listening to music with deep electronic bass, the Sub 4 handles it without distortion, even at high volumes.
The Sub 4 also brings a redesigned Wi-Fi 6 radio for a more stable, lower-latency wireless connection — no dropouts, no sync issues.
Sonos Era 300 — Surround Speakers Reimagined
The two Era 300 surround speakers are what truly separate this system from any soundbar-and-sub combination. The Era 300 is not a conventional rear speaker — it is Sonos's dedicated spatial audio speaker, designed from the ground up for Dolby Atmos.
Six Drivers, Four Directions
Each Era 300 contains six custom drivers firing in four directions: forward, to the side, upward, and inward. This allows a single Era 300 to produce:
• Dolby Atmos side-surround audio
• Dolby Atmos height (ceiling bounce) audio
• Direct rear fill
The combined effect is a surround sound stage that has genuine height and width — not just left-right. When sound pans from the front to the rear in a Dolby Atmos mix, it travels through three-dimensional space. You don't just hear it move; you feel it move.
Wireless, Battery-Free, Always-On
The Era 300 speakers connect to your home Wi-Fi network and pair wirelessly to the Arc Ultra. There are no speaker cables to run across your room. They stay in sync via Sonos's proprietary wireless audio protocol, delivering sub-millisecond latency so lip sync is never an issue.
Sonos Trueplay — Automatic Room Calibration
One of the most underrated features of the Sonos ecosystem is Trueplay room calibration. Using the microphone in your iOS or Android device, Trueplay measures how sound bounces off your walls, floors, furniture, and ceiling — then adjusts the EQ and timing of every driver in the system accordingly.
This means the Sonos Arc Ultra Immersive Set automatically optimises itself to your specific room, not a generic living room. Whether you have a large open-plan space or a compact dedicated viewing room, Trueplay ensures you're getting the best possible sound from your particular environment. At 8mm.in, we've verified Trueplay's effectiveness across dozens of installations — it consistently closes the gap between a good installation and a great one.
Sonos App — Control Everything, Everywhere
The Sonos app is one of the cleanest interfaces in premium audio. From a single screen you can:
• Adjust the soundbar, sub, and surrounds independently
• Run Trueplay calibration
• Control bass, treble, dialogue enhancement, and loudness
• Group the system with other Sonos speakers in your home for multiroom audio
• Stream from Apple Music, Spotify, Amazon Music, Tidal, and more — without a phone actively playing
The Sonos ecosystem also supports Apple AirPlay 2 and Spotify Connect, giving you maximum flexibility in how you send audio to the system.
Why Buy the Sonos Arc Ultra Set from 8mm.in?
8mm.in is an authorised Sonos dealer with over 35 years of experience in premium home theater design and installation across India. When you purchase the Sonos Arc Ultra Ultimate Immersive Set from us, you get:
• Genuine authorised product with Indian warranty
• Expert guidance on placement, room optimisation, and Trueplay calibration
• Access to 8mm's professional home theater installation services if needed
• After-sales support from a team that actually uses and understands this equipment
We've installed Sonos systems across Raipur, Bhilai, Nagpur, Hyderabad, and beyond. We know what makes the difference between a system that sounds good on paper and one that sounds extraordinary in your home.
Who Is the Sonos Arc Ultra Immersive Set For?
• Homeowners who want a clean, wireless home theater without complex AV receiver setups
• Film enthusiasts who want genuine Dolby Atmos — not simulated surround
• Music listeners who want a system that handles both cinematic content and hi-res streaming with equal authority
• Anyone upgrading from a basic soundbar who wants to make the jump to true immersive audio
• Architects and interior designers specifying premium AV for luxury residences
Key Specifications at a Glance
• System: Arc Ultra + Sub Gen 4 + Era 300 × 2
• Audio Format Support: Dolby Atmos, Dolby TrueHD Atmos, DTS:X, PCM
• Connectivity: HDMI eARC (Arc Ultra), Wi-Fi (all units), Apple AirPlay 2, Spotify Connect
• Room Calibration: Sonos Trueplay (iOS + Android)
• Era 300 Drivers: 6 per unit (4 directions)
• Sub Gen 4: Dual opposing force-cancelling woofers
• Control: Sonos app (iOS / Android)
• Price: ₹2,59,999 | Available at 8mm.in
Ready to Transform Your Living Room?
The Sonos Arc Ultra Ultimate Immersive Set is priced at ₹2,59,999 and is available now at 8mm.in with EMI options, authorised warranty, and expert support.
Call or WhatsApp us at +91 89829 27700 or write to contact@8mm.in — our specialists are happy to help you design the perfect home theater for your space.
Order the Sonos Arc Ultra Immersive Set at 8mm.in →
Frequently Asked Questions
1. Does the Sonos Arc Ultra support Dolby Atmos?
Yes. The Arc Ultra fully supports Dolby Atmos, including lossless Dolby TrueHD Atmos via HDMI eARC. It also supports DTS:X and standard PCM audio.
2. How many speakers are included in the Sonos Arc Ultra Immersive Set?
The Sonos Arc Ultra Immersive Set includes four units: one Arc Ultra soundbar, one Sub Gen 4 subwoofer, and two Era 300 surround speakers. Together they form a 5.1.4-channel Dolby Atmos system.
3. Do I need an AV receiver for the Sonos Arc Ultra system?
No. The Sonos Arc Ultra system is completely receiver-free. The Arc Ultra connects to your TV via a single HDMI eARC cable. The Sub 4 and Era 300 speakers connect wirelessly. No separate amplifier or receiver is required.
4. Can the Era 300 speakers produce height audio?
Yes. Each Era 300 contains upward-firing drivers that reflect sound off the ceiling to create convincing Dolby Atmos height channels. When paired with the Arc Ultra, you get a genuine overhead sound layer — not simulated height.
5. Does Sonos Trueplay work on Android?
Yes. Sonos updated Trueplay to support both iOS and Android devices. The calibration process uses your phone's microphone to measure room acoustics and optimise the EQ of each component in the system.
6. What is the price of the Sonos Arc Ultra Immersive Set in India?
The Sonos Arc Ultra Ultimate Immersive Set is priced at ₹2,59,999 at 8mm.in. EMI options are available. Contact us at +91 89829 27700 for more details.
7. Can I add more speakers to this system later?
Yes. The Sonos ecosystem is fully expandable. You can add Sonos speakers in other rooms for whole-home multiroom audio — all controlled from the same app.
8. Is the Sonos Arc Ultra compatible with 4K TVs?
Absolutely. The Arc Ultra connects via HDMI eARC, which is the standard audio connection on all modern 4K TVs. It is compatible with Samsung, LG, Sony, TCL, and all other major TV brands that feature an eARC-capable HDMI port.
9. Does this system support Apple AirPlay 2?
Yes. All components in the Sonos Arc Ultra Immersive Set support Apple AirPlay 2. You can stream directly from your iPhone, iPad, or Mac without opening the Sonos app.
10. Can I buy and install the Sonos Arc Ultra set myself?
The system is designed for straightforward self-setup. However, if you want professional placement, optimal Trueplay calibration, and integration with your home automation or TV setup, 8mm.in offers professional installation services across India. Contact us to schedule a consultation.
Written by Yug Gupta | Audio Specialist at 8mm.in
