Short answer: the BLON Shu. It ranks #899 of 1369 in-ear headphones by sound quality, rated 3.4/5, at $2.49; the Harmonic Empire Cai Wenji ranks #956, rated 3.3/5, at $1.99. With prices this close, go by the sound-quality ranking rather than the cost.
Why pick the BLON Shu: A broadly balanced tuning with a preference score of 66 against the Harman target. Watch for: Treble about 4 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
The case for the Harmonic Empire Cai Wenji: A published AutoEQ preset corrects its response toward the Harman target, so a few minutes of EQ setup closes most of the gap. The catch: Treble about 5 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Buy the BLON Shu. It is rated higher for sound quality, and the $0.50 saving on the Harmonic Empire Cai Wenji is not enough to make up the difference.
Still deciding? The full Headphones rankings cover every ranked option.
A broadly balanced tuning with a preference score of 66 against the Harman target.
Linsoul eBay
A published AutoEQ preset corrects its response toward the Harman target, so a few minutes of EQ setup closes most of the gap.
Shenzhen Audio 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
| BLON Shu | Harmonic Empire Cai Wenji | |
|---|---|---|
| Price | 2.49 | 1.99 |
| Ranked | #899 of 1369 in In-Ear Headphones | #956 of 1369 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 66 (median of 3 squig.link measurements, calibrated to AutoEQ) | 65 (median of 7 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.73 dB standard deviation | 2.58 dB standard deviation |
| Tonal Tilt | -0.33 (negative is warmer, positive brighter) | -0.81 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-1.3 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.9 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | Dual dynamic driver (1 x 10mm + 1 x 6mm composite diaphragm) | 1 x 10mm PEEK+PU dynamic driver |
| Impedance | 16 ohms | 16 ohms |
| Sensitivity | 118 dB/Vrms | 114 dB |
| Frequency Response | 20Hz - 20,000Hz | 20Hz - 20kHz |
| Weight | - | 0 lbs (3.9 g) |
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 BLON Shu from audioamigo, kuping-sensi and soundignity; the Harmonic Empire Cai Wenji from aftersound, bassaudio, csi-zone, dvewlsh, fernandagunsan, hbb and soundignity, all via squig.link.
Related Headphone Comparisons
More worthwhile head-to-heads for BLON Shu: