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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want maximum wired fidelity and a pocketable DAC/amp that drives demanding headphones, choose S.M.S.L D10; if you need wireless freedom, active noise cancelling and marathon battery life for travel and work, choose havit Space S1. These two aren't really rivals — they're answers to two completely different questions. One is a tiny aluminum brick that exists to make wired headphones sound their best. The other is a full-size over-ear Bluetooth headphone built to disappear into your day. Here's how to figure out which question you're actually asking.
• S.M.S.L D10 — biggest strength: Dual Cirrus Logic CS43131 DAC chips with DSD256 and PCM 32bit/384kHz decoding, plus a 4.4mm balanced output pushing up to 500mW at 16Ω — serious wired headroom in a palm-sized aluminum shell.
• S.M.S.L D10 — biggest trade-off: It's a DAC/amp, not a headphone. You supply the headphones, the source device, and on Windows you'll need to install a driver.
• havit Space S1 — biggest strength: Hybrid ANC rated to cut ambient noise by up to -45dB, up to 100 hours of playtime with ANC off (72 hours with it on), and Bluetooth 6.0 with dual-device pairing.
• havit Space S1 — biggest trade-off: It's wireless-only — there's no headphone jack at all — and LHDC hi-res codec support doesn't extend to iPhone or iPad.
• Who each is for: The D10 is for wired-headphone listeners chasing cleaner, louder, more detailed sound. The Space S1 is for travelers, commuters, students and remote workers who want quiet and convenience without cables.
The D10 is a portable USB DAC and headphone amplifier, and its whole reason for existing is signal quality. Inside are two Cirrus Logic CS43131 DAC chips working together — a dual-chip arrangement that, in my opinion, is the most interesting thing about this little box. Doubling up on DAC chips is a design choice aimed at cleaner channel separation and lower noise, and S.M.S.L pairs it with a transparent window in the housing so you can actually see the internals. I like that touch. It signals that the circuitry is the point.
Connectivity is USB, asynchronous, and it plays nicely with Windows 7 through 11 (driver required), macOS 10.6 and later, Linux, Android and iOS. In the box you get a cable and a user manual, and S.M.S.L backs it with a 12-month warranty covering returns or replacement.
Buy the D10 if you already own wired headphones you like and want them to sound better — more headroom, more detail, more control — from a phone, laptop or PC. Skip it if you mostly listen wirelessly, you don't want to deal with drivers or cables, or you're looking for headphones rather than a source upgrade. Also skip it if you want noise cancelling; the D10 does nothing about the world around you.
havit Space S1: Who It's For
The Space S1 is the opposite kind of product: a self-contained over-ear Bluetooth headphone you just put on and forget about. Its headline feature is hybrid active noise cancelling, rated to reduce ambient noise by up to -45dB across multiple levels. Hybrid ANC means it uses microphones inside and outside the ear cup, which is the approach that tends to work best on the steady low-frequency drone of engines, traffic and subway rumble — exactly the noises that make flights and commutes exhausting.
Battery life is the other big number. havit rates it at up to 100 hours with ANC off, or up to 72 hours with ANC on in Bluetooth SBC mode, with a 5-minute quick charge giving up to 5 hours of listening. Real-world figures will move around depending on volume, codec and ANC use, but even allowing for that, this is a headphone designed to be charged occasionally rather than nightly. A full charge takes about 2 hours.
Sound comes from 40mm dynamic drivers using a PEEK and titanium diaphragm, tuned for rich bass and clear treble, with LHDC supporting up to 24bit/192kHz on compatible devices. Note the caveat havit states plainly: iPhone and iPad don't support LHDC, though the headphones still work normally over Bluetooth. There's also spatial sound processing for a wider presentation.
For calls, five built-in microphones with environmental noise cancellation help keep your voice intelligible on meetings and video chats. Comfort and control get real attention too: over-ear cushioned cups, Bluetooth 6.0, dual-device pairing so you can hop between phone and laptop, app-based EQ, and a patented dial for volume and track skipping. The color here is green, and there's no headphone jack — this is wireless only. Warranty is listed as 2.
Buy the Space S1 if you want one pair of headphones for travel, office, study and calls, and you value quiet and battery life above all. Skip it if you're an iPhone user who specifically wants LHDC, you insist on a wired option, or you already own wired headphones and are really shopping for a better source rather than new cans.
• Best for noise cancelling → havit Space S1. Up to -45dB hybrid ANC versus none at all on the D10.
• Best for battery life → havit Space S1. Up to 100 hours with ANC off, 72 hours with it on; the D10 draws power from whatever it's plugged into.
• Best for wired sound quality and headroom → S.M.S.L D10. Dual CS43131 chips, DSD256, PCM 32bit/384kHz, 500mW at 16Ω and 32Ω.
• Best for driving demanding wired headphones → S.M.S.L D10. The 4.4mm balanced output and 160mW at 150Ω matter here; the Space S1 can't drive anything but itself.
• Best for travel and commuting → havit Space S1. ANC plus a 5-minute charge for 5 hours is built for airports and trains.
• Best for calls and meetings → havit Space S1. Five mics with ENC, dual-device pairing and dial controls.
• Best for desktop and laptop listening → S.M.S.L D10. Plug into Windows, macOS, Linux, Android or iOS and it works as a wired source upgrade.
• Best for a single do-everything purchase → havit Space S1, if you don't already own decent wired headphones. The D10 only makes sense as an addition to a wired setup.
My Verdict
The Space S1, clearly. Hybrid ANC rated to -45dB, up to 100 hours with ANC off, and a 5-minute charge for 5 hours of playback are all built for travel. The D10 is portable, but it's tethered to a source device by USB.
Yes. The D10 is a DAC and headphone amplifier only — it has 3.5mm and 4.4mm outputs but no speakers and no built-in drivers. The Space S1, by contrast, is a complete headphone with its own 40mm drivers.
Yes, over standard Bluetooth — but not with LHDC. havit states that iPhone and iPad don't support LHDC, so you'd be using a more common codec instead. Everything else, including ANC and calls, still works.
I can't quote prices here — check the current price on Amazon using the button on this page. On features alone, the Space S1 delivers more for a typical buyer; the D10 is better value only if you already own wired headphones worth upgrading.
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