Short answer: a tie on sound quality. Both are rated 3.4/5 (#863 and #848 of 1291 in-ear headphones) at nearly the same price ($89.95 vs $89.99), so choose on features and fit.
Why pick the iBasso IT01S: A Harman score of 66 in Crinacle’s measurement shows the tuning lands reasonably close to what most listeners prefer. The tradeoff: Deviation from the target averages 2.84 dB, so the response is not especially smooth.
The case for the Truthear Pure: Bass and lower mids sit right on target across 37 measurements, so the sound is clean and uncolored with no bloat. The tradeoff: The sound is subdued up top: the 1 to 3 kHz region is about 3 dB low and presence about 5.5 dB low, with a 6.3 dB dip near 6.3 kHz, so vocals sound recessed and treble lacks detail.
Buy the iBasso IT01S or the Truthear Pure on features: they are rated the same for sound quality at close to the same price.
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A Harman score of 66 in Crinacle’s measurement shows the tuning lands reasonably close to what most listeners prefer.
Amazon $89.95 eBay
Bass and lower mids sit right on target across 37 measurements, so the sound is clean and uncolored with no bloat.
Amazon $89.99 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
| iBasso IT01S | Truthear Pure | |
|---|---|---|
| Price | $89.95 | $89.99 |
| Ranked | #863 of 1291 in In-Ear Headphones | #848 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Harman Preference Score | 66 (measured by crinacle, via AutoEQ) | 67 (median of 37 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.84 dB standard deviation | 2.28 dB standard deviation |
| Tonal Tilt | -0.22 (negative is warmer, positive brighter) | -0.56 (negative is warmer, positive brighter) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Hybrid |
| Drivers | 1 x 10mm dynamic | 1 x 10mm LCP dynamic + 3 x balanced armature |
| Impedance | 16 ohms | 13.8 ohms |
| Sensitivity | 109 dB/mW | 124 dB/Vrms |
| Weight | 0 lbs (8 g) per earbud | - |
| Frequency Response | 10Hz - 43kHz (Manufacturer specified) | 7Hz - 40kHz (Manufacturer specified) |
| Built-in Microphone | No | - |
| Back | Closed | Closed |
| Sub-bass Extension | - | Within 6 dB of target down to 20 Hz (-2.3 dB at 30 Hz) |
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