Soundcore Liberty 4 NC vs Space A40: which earbuds should you buy?
quilkitdeals-20. Specs come from Soundcore/Anker listings and published reviews; prices are ~approximate USD — confirm on Amazon. No invented Buy Box claims or review scores. Full disclosure.
Searching Soundcore Liberty 4 NC vs Space A40 usually means you want solid noise cancelling under $100 and you are stuck between Anker's two most-recommended pairs. The short version: battery and IP ratings look almost identical on the spec sheet; Liberty 4 NC is the stronger ANC and sound pick, while Space A40 wins on a lighter everyday fit and (often) a lower Amazon price.
Quick verdict
- Buy Soundcore Liberty 4 NC if you want Adaptive ANC 2.0, HearID EQ and 11mm drivers for commuting, flights and focused listening.
- Buy Soundcore Space A40 if you want a lighter stemless fit for all-day wear and want to spend as little as possible that week.
Best ANC & sound
Soundcore Liberty 4 NC
Adaptive ANC 2.0 (Soundcore claims up to 98.5% noise reduction), 11mm drivers, LDAC, multipoint, wireless charging and HearID 2.0 EQ. Brand battery: up to 10h/50h with ANC off, 8h/40h with ANC on. IPX4 sweat resistance; Bluetooth 5.3.
~$79.99 USDApproximate; confirm on Amazon
Shop Liberty 4 NC on Amazon →
Best comfort & value
Soundcore Space A40
Adaptive ANC (Soundcore claims up to 98% less noise on commutes), 10mm drivers, LDAC, multipoint and wireless charging in a lighter stemless shell. Same headline battery claim as Liberty 4 NC: up to 10h/50h ANC off, 8h/40h ANC on. IPX4.
~$79.99 USDApproximate; confirm on Amazon
Shop Space A40 on Amazon →Specs side by side
| Spec | Liberty 4 NC | Space A40 |
|---|---|---|
| Battery, ANC off (buds / with case) | Up to 10h / 50h | Up to 10h / 50h |
| Battery, ANC on (buds / with case) | Up to 8h / 40h | Up to 8h / 40h |
| LDAC + ANC on | Up to 5h / 25h | Up to 5h / 25h |
| Drivers | 11mm | 10mm |
| ANC system | Adaptive ANC 2.0 | Adaptive ANC |
| Hi-Res codec | LDAC | LDAC |
| Water rating (buds) | IPX4 | IPX4 |
| Wireless charging | Yes | Yes |
| Standout extra | HearID 2.0 EQ, Fast Pair | Lighter stemless fit |
| Approx Amazon price | ~$80 | ~$80 (often less) |
Battery figures are Soundcore lab claims at default settings and ~50% volume. Real-world runtime varies with volume, codec and connection quality.
Noise cancelling: Liberty 4 NC leads
Both pairs use adaptive ANC that adjusts to your environment, and both advertise very high noise-reduction percentages in marketing copy. Independent lab scores (for example SoundGuys' ANC rating for Liberty 4 NC) put Liberty 4 NC among the stronger performers under $100. Space A40 is still useful for bus engines and HVAC rumble, but if quieter trains, offices or short-haul flights are the main goal, lean Liberty 4 NC. For more options in this lane, see our ANC earbuds under $100 and commuting earbuds guides.
Battery: a near tie
Don't pick between these two on battery alone. Soundcore publishes the same 10h/50h (ANC off) and 8h/40h (ANC on) claims for both, and the same LDAC penalty (about 5h/25h with ANC on). A 10-minute fast charge on Liberty 4 NC is rated for about 4 hours of music — handy between meetings. Either pair easily covers a workday plus a commute when you keep the case topped up.
Sound, LDAC and Android
Liberty 4 NC's larger 11mm drivers and HearID 2.0 personalization give it the edge if you care about EQ tuning. Both list LDAC for compatible Android phones; iPhone falls back to AAC. Multipoint works on both, but Soundcore notes LDAC may limit dual-device use on Space A40 — switch codecs in the soundcore app as needed. More LDAC context is in our best earbuds for Android guide.
Fit, gym and design
Space A40's compact stemless shape is the comfort pick for many small ears and long wear days. Liberty 4 NC is still light (Soundcore lists about 5.2 g per bud) with a stem design and four tip sizes. Both are IPX4 only — fine for sweat, not for swimming. If you need wingtips that lock in for HIIT, skip both and look at the wingtip picks in our gym earbuds guide.
Cheaper and pricier alternatives
Need something closer to $50? JBL Tune Buds add IP54 dust and water resistance with ANC, though battery claims differ and the seal is tip-dependent. Stepping up from Soundcore? Compare flagships in best ANC earbuds 2026 or the Sony WF-1000XM5 vs Nothing Ear (3) comparison.
Budget under $50
JBL Tune Buds
IP54 water and dust resistance, ANC with Ambient Aware, and long total playtime claims — a common step-down when both Soundcore pairs feel like more than you want to spend on a backup gym or commute pair.
~$49.95 USDApproximate; confirm on Amazon
Shop JBL on Amazon →Frequently asked questions
Is Soundcore Liberty 4 NC better than Space A40?
For noise cancelling and sound detail, Liberty 4 NC is the safer pick: Soundcore rates Adaptive ANC 2.0 with up to 98.5% noise reduction and 11mm drivers, and independent labs score its ANC highly for the price. Space A40 is better if you want a lighter stemless fit for all-day wear and often find it cheaper on Amazon.
Do Liberty 4 NC and Space A40 have the same battery life?
On paper, yes. Soundcore rates both at up to 10 hours per charge with ANC off (50 hours with the case) and up to 8 hours with ANC on (40 hours with the case). With LDAC and ANC on, both drop to about 5 hours per charge (25 hours with the case).
Do both support LDAC and multipoint?
Both list SBC, AAC and LDAC, plus multipoint for two devices. On iPhone you get AAC, not LDAC. Soundcore notes that turning on LDAC may limit multipoint on Space A40 — check the soundcore app for your firmware.
Which is better for small ears or all-day comfort?
Many shoppers prefer Space A40 for a lighter, stemless shell that sits lower in the ear. Liberty 4 NC buds are still light (Soundcore lists about 5.2 g each) but use a slightly bulkier stem design. Tip seal matters more than model — try the included sizes and use Amazon returns if the fit is wrong.
Are they waterproof for the gym?
Both earbuds are rated IPX4 for sweat and splashes. That is enough for most indoor workouts, but neither is built for swimming or heavy rain. For a more locked-in gym fit, also look at wingtip options like Beats Fit Pro.
Which Soundcore earbuds should I buy under $100?
Buy Liberty 4 NC if you want stronger Adaptive ANC 2.0 and HearID EQ tuning. Buy Space A40 if comfort and a frequently lower street price matter more. Check the live Amazon prices the week you buy — they often sit within a few dollars of each other. Browse both in the Quilkit Shop.