Short answer: the EarAcoustic STA Pro. It ranks #856 of 1369 in-ear headphones by sound quality, rated 3.4/5, at $49.90; the HeartField Blanc ranks #957, rated 3.3/5, at $49. Close enough in price that the sound-quality gap is the deciding factor.
What the EarAcoustic STA Pro does well: A broadly balanced tuning with a preference score of 67 against the Harman target. Watch for: An uneven response, 2.4 dB standard deviation from target.
What the HeartField Blanc does well: A published AutoEQ preset corrects its response toward the Harman target, so a few minutes of EQ setup closes most of the gap. Watch for: An uneven response, 2.8 dB standard deviation from target.
Buy the EarAcoustic STA Pro. It is rated higher for sound quality, and the $0.90 you would save on the HeartField Blanc does not close the gap.
Looking for alternatives? See the complete Headphones rankings.
A broadly balanced tuning with a preference score of 67 against the Harman target.
Linsoul $49.90 eBay
A published AutoEQ preset corrects its response toward the Harman target, so a few minutes of EQ setup closes most of the gap.
Linsoul eBayPrices on this page were last checked October 17, 2026 at 6:04 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| EarAcoustic STA Pro | HeartField Blanc | |
|---|---|---|
| Price | $49.90 | 49.00 |
| Ranked | #856 of 1369 in In-Ear Headphones | #957 of 1369 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 67 (median of 3 squig.link measurements, calibrated to AutoEQ) | 65 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.41 dB standard deviation | 2.83 dB standard deviation |
| Tonal Tilt | -0.55 (negative is warmer, positive brighter) | +0.22 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.3 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-3.5 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Balanced Armature |
| Drivers | 2 x dynamic drivers (1 x 10mm graphene + 1 x 6mm titanium-plated) | 5 balanced armature drivers per side |
| Impedance | 18 ohms | 15 ohms |
| Sensitivity | 113 dB | - |
| Frequency Response | 10Hz - 30kHz | - |
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 EarAcoustic STA Pro from aftersound, avishai, lumerion and pw; the HeartField Blanc from dl, gadgetrytech, jaytiss and silicagel, all via squig.link.
Related Headphone Comparisons
More worthwhile head-to-heads for EarAcoustic STA Pro: