Short answer: the Tanchjim Fission. It ranks #201 of 450 in-ear headphones by sound quality, rated 4.2/5, at $129.99. The Ucotech RE-3 Pro ranks #221, rated 4.1/5, at $119, $10.99 cheaper, not enough of a saving to outweigh the sound-quality gap.
Buy the Tanchjim Fission. It is rated higher for sound quality, and the $10.99 you would save on the Ucotech RE-3 Pro does not close the gap.
Still deciding? The full Headphones rankings cover every ranked option.
Specifications Side By Side
| Tanchjim Fission | Ucotech RE-3 Pro | |
|---|---|---|
| Price | $129.99 | $119.00 |
| Ranked | #201 of 450 in In-Ear Headphones | #221 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 76 (median of 13 squig.link measurements, calibrated to AutoEQ) | 75 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.99 dB standard deviation | 1.72 dB standard deviation |
| Tonal Tilt | +0.01 (negative is warmer, positive brighter) | -0.53 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.3 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+0.8 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x dynamic | 1 x 10mm dynamic |
| Impedance | 16 ohms | 30 ohms |
| Sensitivity | 126 dB | 105 dB/mW |
| Frequency Response | 8Hz - 48kHz (Manufacturer specified) | 20Hz - 20kHz (Manufacturer specified) |
| Built-in Microphone | - | No |
Related Headphone Comparisons
How Tanchjim Fission compares with other leading options:
- Sennheiser IE 200 vs Tanchjim Fission
- Moondrop Starfield 2 vs Tanchjim Fission
- ArpegEar Hane vs Tanchjim Fission
- ArpegEar Hane vs Ucotech RE-3 Pro
- Ucotech RE-3 Pro vs Tin HiFi T5S
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
Tanchjim Fission: $129.99 Amazon eBay
Full Tanchjim Fission review and specifications →
| Released | May 2025 (1 year ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 1.99 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x dynamic |
| Form Factor | In-ear |
| Frequency Response | 8Hz - 48kHz (Manufacturer specified) |
| Harman Preference Score | 76 (median of 13 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 16 ohms |
| Sensitivity | 126 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.3 dB at 30 Hz) |
| Tonal Tilt | +0.01 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Ucotech RE-3 Pro: $119.00 Bloom Audio eBay
Full Ucotech RE-3 Pro review and specifications →
| Back | Closed |
|---|---|
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 1.72 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 10mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 75 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 30 ohms |
| Sensitivity | 105 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.8 dB at 30 Hz) |
| Tonal Tilt | -0.53 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons