Fosi Audio SW10 Active Subwoofer

When I first got the Fosi SW10, I didn’t expect too much. It’s reasonably priced, looks simple, and doesn’t try to look flashy. But once I hooked it up and started listening, it immediately impressed me. The SW10 delivers bass that feels solid, clean, and surprisingly refined for the price.
The low end response is tight and well controlled not the kind of muddy, overblown bass you sometimes get from cheaper subs. It adds real weight to the sound without overpowering the mids or highs. With EDM or hip-hop, you get that satisfying, physical punch. With jazz, acoustic, or even classical, it just rounds out the sound naturally. It’s the kind of bass that feels integrated, not forced and that’s rare at this price point.
Build quality is also better than expected. The matte finish looks clean and professional, and the cabinet feels sturdy and well damped. Even when pushing it at higher volumes, there’s no rattling or buzzing. The knobs for gain, crossover, and phase all move smoothly and make setup simple. You can tell Fosi actually cared about how this thing feels to use, not just how it sounds.
Performance wise, the SW10 has plenty of power for small and medium sized rooms. Even at lower volume levels, the bass is present and nicely balanced. When you turn it up, it delivers a full, room filling low end without losing control or clarity. It pairs beautifully with Fosi’s own amps but works just as well with other brands. In a nearfield or desktop setup, it really shines providing that missing depth without overdoing it.
After using it for a while, I’d say the SW10 is one of those products that just quietly gets everything right. It doesn’t try too hard, and it doesn’t need to. It’s well-built, sounds great, and offers a kind of honest, musical bass that fits perfectly into most setups.
If you’re looking for a subwoofer that’s clean, punchy, and well-balanced something that enhances your system without breaking the bank the Fosi Audio SW10 is an easy recommendation. It’s not trying to shake your walls; it’s trying to make your music sound right. And it does exactly that.

This subwoofer delivers exceptional depth and clarity, offering tight, powerful bass that rivals models costing much more. It combines great sound with truly unparalleled customer support — responsive, friendly, and committed to satisfaction. A rare blend of performance, value, and service. Highly recommended.

The set-up: SP601; SW10 & MC101
The use: BT streaming for phone & PC

I have this set-up in my home office (13x14) and I absolutely love the range of sound the SW10 gives the SP601s. The 601s produce great highs and mid-range and the low end from the SW10 really balances everything. I know that BT streaming isn't the purest signal but I think anyone with this set-up would be amazed at the rich tones produced. Kudos to Fosi for producing some of the most amazing components and value!

I did not expect to see these so soon!!!

I submitted the subwoofer feedback survey back when Fosi was asking and they released something nearly identical to the specifications I suggested. I felt obligated to buy them because of how good of a match they are! I bought two because they were half the price point I expected with the spec.

For comparison, I used two Dayton audio SUB-1200s. They were $199 each and have front firing 12s with 100w amps. They felt considerably underpowered and I had phasing issues due to their location and lack of adjustability.

Out of the box the Fosi subs are crisp, compact, and very clean cut. I do not like the white. Why it is the first and only color available is surprising. I am considering ways to refinish these soon.

I'm only a couple of hours into break-in and these are much more impactful than what I replaced. The down-firing driver makes a drasticly increased tactile experience.

Musically, they're very clean and easily fill a 16x20 room.

I have yet to listen to them in surround sound, which is a secondary purpose for me.

I estimate with 100 hours or so of break-in and fine tuning phase, crossover points, and port direction, I am going to be a very happy camper.

Already preordered at a very deal price ! Waiting for delivery as a baby in front of a piece of cake ! ;-)