Short answer: the Anker Soundcore Space A40, though neither ranks well in its class. Both are rated 2.5/5 for sound quality (#1093 and #1096 of 1291 in-ear headphones), and the Anker Soundcore Space A40 costs $54.99 against $69 for the iBasso IT01, so with nothing between them on sound quality, price settles it. Both are rated below 3.0/5 among the 1291 in-ear headphones; for better sound, the Intuaura Reference 2019 ranks #7 at $34.99.
Why pick the Anker Soundcore Space A40: Active noise cancelling, LDAC streaming, IPX4 splash resistance and a claimed 10 hours per charge (50 with the case) make this a well equipped set of true wireless earbuds for the money. Watch for: Sub-bass falls 6 dB below target by 42 Hz and is 7.5 dB down at 30 Hz, so deep synth bass and movie rumble go missing.
What the iBasso IT01 does well: A single 10mm dynamic driver with 16 ohm impedance and 108 dB sensitivity runs easily from a phone or dongle. The catch: Its preference score of 55 from crinacle’s measurement is far from the Harman target, with a noticeably warm tilt.
Buy the Anker Soundcore Space A40. Both are rated the same for sound quality, and it costs $14.01 less than the iBasso IT01.
Still deciding? The full Headphones rankings cover every ranked option.
Active noise cancelling, LDAC streaming, IPX4 splash resistance and a claimed 10 hours per charge (50 with the case) make this a well equipped set of true wireless earbuds for the money.
Amazon $54.99 eBay
A single 10mm dynamic driver with 16 ohm impedance and 108 dB sensitivity runs easily from a phone or dongle.
Amazon $69.00 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
| Anker Soundcore Space A40 | iBasso IT01 | |
|---|---|---|
| Price | $54.99 | $69.00 |
| Ranked | #1093 of 1291 in In-Ear Headphones | #1096 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 56 (median of 1 squig.link measurements, calibrated to AutoEQ) | 55 (measured by crinacle, via AutoEQ) |
| Deviation From Target | 2.97 dB standard deviation | 3.12 dB standard deviation |
| Tonal Tilt | +0.34 (negative is warmer, positive brighter) | -1.19 (negative is warmer, positive brighter) |
| Sub-bass Extension | Falls 6 dB below target at 42 Hz (-7.5 dB at 30 Hz) | - |
| Connection | True wireless | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 10mm dynamic | 1 x 10mm dynamic |
| Weight | 0 lbs (4.9 g) per earbud | - |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) | 10Hz - 42kHz (Manufacturer specified) |
| Active Noise Cancelling | Yes | - |
| Battery Life | 10 hours (50 with case, Manufacturer specified) | - |
| Bluetooth Version | 5.2 | - |
| Bluetooth Codecs | SBC, AAC, LDAC | - |
| Built-in Microphone | Yes | - |
| IP Rating | IPX4 | - |
| Impedance | - | 16 ohms |
| Sensitivity | - | 108 dB |
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