Short answer: the Oriveti Bleqk Dynabird. It ranks #121 of 450 in-ear headphones by sound quality, rated 4.4/5, at $99.99; the Fosi Audio IM4 ranks #133, rated 4.3/5, at $99.99. Close enough in price that the sound-quality gap is the deciding factor.
Buy the Oriveti Bleqk Dynabird. It is rated higher for sound quality than the Fosi Audio IM4 at the same price, so it is the default pick unless a specific strength of the other one matters more to you.
Looking for alternatives? See the complete Headphones rankings.
Specifications Side By Side
| Oriveti Bleqk Dynabird | Fosi Audio IM4 | |
|---|---|---|
| Price | $99.99 | $99.99 |
| Ranked | #121 of 450 in In-Ear Headphones | #133 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 78 (median of 4 squig.link measurements, calibrated to AutoEQ) | 78 (median of 5 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.76 dB standard deviation | 1.75 dB standard deviation |
| Tonal Tilt | -0.02 (negative is warmer, positive brighter) | -0.02 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-1.7 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.4 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 9.2mm dynamic | 1 x 10mm dynamic |
| Impedance | 16 ohms | 21 ohms |
| Sensitivity | 105 dB/mW | 109 dB |
| Frequency Response | 10Hz - 20kHz (Manufacturer specified) | 20Hz - 20kHz (Manufacturer specified) |
| Built-in Microphone | No | No |
| Weight | - | 0 lbs (7 g) per earbud |
Related Headphone Comparisons
More top alternatives to Oriveti Bleqk Dynabird:
- 7Hz Salnotes Dioko vs Oriveti Bleqk Dynabird
- Oriveti Bleqk Dynabird vs Tanchjim Mino
- Oriveti Bleqk Dynabird vs Moondrop Kato
- Fosi Audio IM4 vs Moondrop Kato
- Fosi Audio IM4 vs Moondrop Rays
Prices on this page were last checked October 11, 2026 at 4:59 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
Oriveti Bleqk Dynabird: $99.99 Amazon eBay
Full Oriveti Bleqk Dynabird review and specifications →
| Back | Closed |
|---|---|
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 1.76 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 9.2mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 10Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 78 (median of 4 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 16 ohms |
| Sensitivity | 105 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-1.7 dB at 30 Hz) |
| Tonal Tilt | -0.02 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Fosi Audio IM4: $99.99 Amazon eBay
Full Fosi Audio IM4 review and specifications →
| Released | 2025 (1 year ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 1.75 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 10mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 78 (median of 5 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 21 ohms |
| Sensitivity | 109 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-1.4 dB at 30 Hz) |
| Tonal Tilt | -0.02 (negative is warmer, positive brighter) |
| Weight | 0 lbs (7 g) per earbud |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons