Short answer: a tie on sound quality. Both are rated 3.9/5 (#534 and #533 of 1291 in-ear headphones) at nearly the same price ($25 vs $22.80), so choose on features and fit.
What the JCALLY Space does well: A budget single dynamic in-ear with a 10mm driver, a preference score of 72 and treble right on the Harman target. Watch for: Sub-bass falls about 3.7 dB short at 30 Hz.
Why pick the TANGZU Wan’er S.G II: A very cheap single dynamic IEM, the second generation of the TANGZU Wan’er S.G. The tradeoff: Treble sits about 4.0 dB below target, a dark, relaxed balance.
Buy the JCALLY Space or the TANGZU Wan’er S.G II on features: they are rated the same for sound quality at close to the same price.
Still deciding? The full Headphones rankings cover every ranked option.
A budget single dynamic in-ear with a 10mm driver, a preference score of 72 and treble right on the Harman target.
Headphone Zone eBay
A very cheap single dynamic IEM, the second generation of the TANGZU Wan’er S.G.
Amazon $22.80 eBayPrices on this page were last checked October 16, 2026 at 5:46 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| JCALLY Space | TANGZU Wan’er S.G II | |
|---|---|---|
| Price | $25 | $22.80 |
| Ranked | #534 of 1291 in In-Ear Headphones | #533 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 10mm dynamic | 1 x 10mm dynamic |
| Harman Preference Score | 72 (median of 3 squig.link measurements, calibrated to AutoEQ) | 72 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.17 dB standard deviation | 2.07 dB standard deviation |
| Tonal Tilt | +0.43 (negative is warmer, positive brighter) | -0.41 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.7 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.3 dB at 30 Hz) |
| Impedance | - | 19 ohms |
| Sensitivity | - | 113.5 dB |
Frequency Response Compared
Both headphones’ measurements overlaid on the Harman target. Above the target sounds louder in that range, below it quieter. Each curve is the median of several independent measurements, shifted so its 500 Hz to 2 kHz average sits at 0 dB, so only the tuning is compared.
Measurement data: the JCALLY Space from fernandagunsan, kuping-sensi and soundignity; the TANGZU Wan’er S.G II from lestat, pw and sl0the, all via squig.link.
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