Overview
The Sub 4 and Sub Mini exist for fundamentally different rooms and budgets. The Sub 4 is Sonos's flagship subwoofer with dual force-cancelling woofers that deliver deep, room-shaking bass down to around 25 Hz. The Sub Mini uses a smaller dual-driver design in a cylindrical enclosure and rolls off closer to 35 Hz. That 10 Hz gap matters more than you'd think -- it's the difference between feeling an explosion and just hearing one.
The Sub 4 pairs with any Sonos soundbar or speaker, but it's really built for the Arc and Arc Ultra in medium-to-large rooms. The Sub Mini was designed with the Beam and smaller setups in mind. Sonos doesn't officially restrict pairings, but physics does: a Sub Mini pushing bass into a 500 sq ft living room will sound thin and strained.
Price-wise, the Sub 4 runs $799 and the Sub Mini sits at $429. That's a $370 gap, which is significant. But here's the thing -- if your room actually needs the Sub 4, the Sub Mini won't cut it, and you'll end up upgrading anyway. Buy for your room, not your wallet.
Key Differences
| Feature | Sub 4 | Sub Mini |
|---|---|---|
| Drivers | Dual force-cancelling woofers | Dual custom woofers (smaller) |
| Frequency response | ~25 Hz low end | ~35 Hz low end |
| Room size | 100-600 sq ft | 50-250 sq ft |
| Best paired with | Arc Ultra, Arc | Beam Gen2, Era speakers |
| Finish | Matte Black or White | Matte Black or White |
| Wireless | WiFi 6 | WiFi 5 |
| Weight | 36.3 lbs | 14 lbs |
| Price | $799 | $429 |
Best For
Buy the Sub 4 if: You have an Arc or Arc Ultra in a room over 200 sq ft and you want bass you can feel in your chest. You're building a serious home theater. You have a detached home or thick walls and neighbors won't be a problem.
Buy the Sub Mini if: You have a Beam Gen2 or Ray in a room under 200 sq ft. You want to add some low-end to a bedroom or office setup without spending $800. You live in an apartment and don't need subterranean bass -- just some warmth below what your soundbar can produce.
Skip If
Don't buy the Sub 4 if: You live in an apartment with thin walls. Your neighbors will hear and feel everything. The Sub Mini gives you enough bass for close-quarters living without the noise complaints.
Don't buy the Sub Mini if: You have an Arc Ultra. Seriously. The Arc Ultra's built-in Sound Motion bass is better than what the Sub Mini adds. You'd be spending $429 to make your system sound worse (the Sub Mini can actually muddy the Arc Ultra's low end). Either skip the sub entirely or go full Sub 4.
Skip both if: Your budget is tight and you're still using a Beam Gen2. The Beam sounds surprisingly decent on its own for small rooms. A sub is a luxury upgrade, not a necessity, for compact setups.
Verdict
For most home theater setups, the Sub 4 is the right subwoofer. Yes, it costs nearly twice as much, but it serves rooms the Sub Mini physically cannot. The Sub Mini earns its place in bedrooms, offices, and apartments paired with a Beam Gen2 -- it's genuinely good for what it is. Just don't ask it to do more than it was designed for.
Buy Sub 4 from Velora -> Buy Sub Mini from Velora ->