Short answer: the BLON BL-03 II. It ranks #505 of 668 in-ear headphones by sound quality (rated 3.4/5) and is still sold new; the BLON BL-03 ranks #597 (rated 2.6/5) and is discontinued, so it is only an option used.
The case for the BLON BL-03: A budget classic with full, warm bass about 4 dB above target and extension to 20 Hz, giving a fun, easy listening sound. The tradeoff: Discontinued, so it is mainly found used.
The BLON BL-03 II is the better-sounding choice. Bass is lifted about 3.8 dB with extension to 20 Hz, giving kick drums and bass lines extra weight. The tradeoff: A 5.9 dB peak near 11.9 kHz can make cymbals and sibilance sound sharp.
Buy the BLON BL-03 II. It is rated higher for sound quality, and the BLON BL-03 is discontinued, so it is only available used.
Still deciding? The full Headphones rankings cover every ranked option.
Specifications Side By Side
| BLON BL-03 | BLON BL-03 II | |
|---|---|---|
| Price | Discontinued | - |
| Ranked | #597 of 668 in In-Ear Headphones | #505 of 668 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 (carbon diaphragm) | 1 x 10mm dual-cavity dynamic |
| Impedance | 32 ohms | 32 ohms |
| Sensitivity | 102 dB/mW | - |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) | 20Hz - 20kHz |
| Harman Preference Score | 57 (measured by oratory1990, via AutoEQ) | 66 (median of 10 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 3.00 dB standard deviation | 2.26 dB standard deviation |
| Tonal Tilt | -1.30 (negative is warmer, positive brighter) | -0.87 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+2.5 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+1.5 dB at 30 Hz) |
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Prices on this page were last checked October 12, 2026 at 4:13 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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The Two Headphones In Full
BLON BL-03 Discontinued eBay
Newer model: the BLON BL-03 II, ranked higher, rated 3.4/5, released 2025. See every BLON BL-03 generation.
Pros: A budget classic with full, warm bass about 4 dB above target and extension to 20 Hz, giving a fun, easy listening sound.
Cons: Discontinued, so it is mainly found used. Presence sits about 3.8 dB low with a 5.8 dB dip near 6.4 kHz, so it lacks some detail, and the shell shape is known for a tricky fit. Its Harman score of 57 trails modern budget IEMs.
Full BLON BL-03 review and specifications →
| Released | 2019 (7 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 3.00 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 10mm dynamic (carbon diaphragm) |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 57 (measured by oratory1990, via AutoEQ) |
| Impedance | 32 ohms |
| Sensitivity | 102 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+2.5 dB at 30 Hz) |
| Tonal Tilt | -1.30 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -5.7 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -3.1 dB | 0.70 |
| Peak | 176 Hz | -4.2 dB | 0.90 |
| Peak | 3,339 Hz | +4.9 dB | 2.96 |
| Peak | 707 Hz | +2.3 dB | 1.69 |
| Peak | 6,364 Hz | +5.2 dB | 3.64 |
| High shelf | 10,000 Hz | +2.6 dB | 0.70 |
| Peak | 1,931 Hz | -1.7 dB | 2.22 |
| Peak | 2,724 Hz | +1.2 dB | 4.73 |
| Peak | 59 Hz | +0.3 dB | 1.85 |
| Peak | 981 Hz | +0.5 dB | 3.20 |
- Reviews, Comparisons and Sound Samples
BLON BL-03 II eBay
Older model: the BLON BL-03 (ranked lower, rated 2.6/5). See every BLON BL-03 generation.
Pros: Bass is lifted about 3.8 dB with extension to 20 Hz, giving kick drums and bass lines extra weight. Upper treble lifts about 5.4 dB for extra air and sparkle. Lower mids sit within about 0.7 dB of target, keeping voices and guitars natural. It uses 1 x 10mm dual-cavity dynamic with an easy 32 ohm load.
Cons: A 5.9 dB peak near 11.9 kHz can make cymbals and sibilance sound sharp.
Full BLON BL-03 II review and specifications →
| Released | 2025 (1 year ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 2.26 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 10mm dual-cavity dynamic |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 20kHz |
| Harman Preference Score | 66 (median of 10 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 32 ohms |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.5 dB at 30 Hz) |
| Tonal Tilt | -0.87 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples