If you’re ready to elevate your home audio or theater experience, adding a dedicated Sonos subwoofer brings powerful, room-shaking bass that your soundbar or speakers just can’t deliver on their own. Sonos offers the Sub (Gen 3) — a proven performer from recent years — and the newer Sonos Sub 4, which builds on that legacy with design and future-proofing enhancements. Here’s how they compare and which one is the better choice for most buyers today.
Sonos Sub 4 — Best Premium Wireless Subwoofer for Immersive Audio
While the Gen 3 Subwoofer delivers identical core bass performance and remains capable, the Sub 4 brings updated processing power, modern finish, and future compatibility that make it the wiser purchase for a long-lasting home audio investment — especially when current deals bring its price closer to the older model.
Why Do I Recommend Sonos Sub 4?
- Future-ready electronics: Sonos Sub 4 uses an improved processor and system architecture that supports software updates and better integration with current Sonos products — giving you confidence that it will remain supported longer.
- Modern matte finish: The Sub 4 has a matte finish that matches Sonos’s latest speaker lineup more seamlessly than the glossy Gen 3, enhancing aesthetic continuity in living rooms and home theaters.
- Identical deep bass performance: Both Sub 3 and Sub 4 deliver rich, powerful low frequencies that add depth and impact to music, movies, and games — the core function you really care about in a subwoofer.
- Backwards compatibility: Sub 4 remains compatible with older Sonos devices and can even pair with Gen 3 subwoofers for dual-sub setups, giving you flexibility if you expand your system later.
- Strong deal potential: Sonos subwoofers tend to receive seasonal discounts and bundle offers, which often brings the Sub 4 into compelling price territory versus the Gen 3. (Seasonal deals have historically included Sub discounts.)
Detailed Comparison & Recommendation
| Feature | Sonos Sub (Gen 3) | Sonos Sub 4 |
|---|---|---|
| Core Bass Performance | ⭐⭐⭐⭐⭐ — strong low frequency & impactful bass | ⭐⭐⭐⭐⭐ — same industry-leading bass architecture |
| Processor & Electronics | Older generation electronics | Newer CPU and processing for future support |
| Finish & Design | Glossy finish — reflective style | Updated matte finish for modern Sonos look |
| Wi-Fi / Connectivity | Standard Sonos Wi-Fi integration | Same wireless integration with updated board |
| Dual Sub Compatibility | Works with same generation | Works with Gen 3 and Gen 4 for more flexible setups |
| Best Room Size | Medium-large rooms | Medium-large rooms |
| Value for Money | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
| Overall Recommendation | Great value | Best overall for new buyers |
| Recommended Best Seller |
What Is the Major Difference Between Sonos Sub 3 vs Sub 4?
- Modernized internals: Sub 4 is built with a newer processor and memory, which helps it stay compatible with future Sonos updates and pairing logic.
- No major audio difference: From a sound quality and bass output perspective, the Sub 4 and Gen 3 share the same acoustic fundamentals and deliver similarly powerful low-end performance in real listening scenarios.
- Finish & aesthetic: Sub 4’s matte exterior better matches Sonos’s current lineup than the Gen 3’s glossy look, which some find more cohesive in multi-speaker setups.
- Weight & enclosure detail: Gen 4 is slightly lighter due to material and internal updates, but the practical difference in real-world usage is minimal.
- Longevity & support: Sub 4’s updated electronics theoretically position it better for future Sonos firmware support and feature expansion.
What Users Are Saying
| User Feedback Area | Sonos Sub (Gen 3) | Sonos Sub 4 |
|---|---|---|
| Deep bass impact | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ |
| Setup & integration | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
| Aesthetic / finish | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
| Longevity & future-proofing | ⭐⭐⭐ | ⭐⭐⭐⭐ |
| Overall user satisfaction | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
| Recommended Best Seller |
Fair Advice to Consider
- Choose Sonos Sub (Gen 3) if you find it at a notably lower price on Amazon or third-party sellers — it’s still a powerful subwoofer that fills out music and movie audio beautifully.
- Choose Sonos Sub 4 if you want the latest version with improved internal components, a modern matte look, and the best long-term value — perfect for pairing with Arc, Beam, Five, or other Sonos speakers.
- Both units pair effortlessly via Wi-Fi to your Sonos system and will enhance bass across music streaming, movie soundtracks, and gaming audio.
Quick Summary
| Category | Sonos Sub (Gen 3) | Sonos Sub 4 |
|---|---|---|
| Bass Depth & Power | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ |
| Latest Electronics | ⭐⭐⭐ | ⭐⭐⭐⭐ |
| Aesthetic Design | ⭐⭐⭐⭐ | ⭐⭐⭐⭐⁺ |
| Longevity & Updates | ⭐⭐⭐ | ⭐⭐⭐⭐ |
| Compatibility | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
| Best For | Value — if discounted | Best long-term premium choice |
| Recommended Best Seller |
FAQs
Do Sonos Sub 3 and Sub 4 sound different?
Most listening tests and user feedback indicate no significant difference in core bass performance — both deliver deep, room-shaking low frequencies.
Is Sub 4 worth the extra price?
Yes — if you want updated electronics, modern finish, and longer support longevity, Sub 4 is worth the investment.
Can they pair with Sonos Arc or Beam?
Yes — both subs integrate seamlessly with Sonos soundbars and speaker setups via Wi-Fi.
Will Sonos continue software updates for Sub 3?
Yes — but Sub 4’s newer processing hardware is better positioned to receive future updates longer.
Are there deals right now?
Sonos subs often see seasonal discounts or bundle deals, especially around major sales events, which can make Sub 4 more attractive.
Final Verdict
If you want premium, room-filling bass that makes movies and music come alive, Sonos Sub 4 is the best choice for most buyers today. It combines Sonos’s signature deep bass with updated hardware, refined design, and future-proof support — making it a subwoofer you’ll enjoy for years. Its ability to work seamlessly with the rest of the Sonos ecosystem and benefit from seasonal deals makes it a sure-purchase recommendation.