Short answer: a tie on sound quality. Both are rated 4.2/5 (#197 and #178 of 450 in-ear headphones) at nearly the same price ($19.99 vs $19.99), so choose on features and fit.
Buy the Tanchjim Zero Ultima or the Tin HiFi C0 on features: they are rated the same for sound quality at close to the same price.
Still deciding? The full Headphones rankings cover every ranked option.
Specifications Side By Side
| Tanchjim Zero Ultima | Tin HiFi C0 | |
|---|---|---|
| Price | $19.99 | $19.99 |
| Ranked | #197 of 450 in In-Ear Headphones | #178 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 76 (median of 7 squig.link measurements, calibrated to AutoEQ) | 77 (median of 14 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.95 dB standard deviation | 1.81 dB standard deviation |
| Tonal Tilt | +0.03 (negative is warmer, positive brighter) | +0.24 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.6 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-4.0 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x dynamic | 1 x dynamic |
| Impedance | 30 ohms | 32 ohms |
| Sensitivity | 123 dB/V | 105 dB |
| Weight | 0 lbs (2.3 g) per earbud | 0 lbs (3.8 g) per earbud |
| Frequency Response | 10Hz - 48kHz (Manufacturer specified) | - |
| Built-in Microphone | Yes | - |
Related Headphone Comparisons
More worthwhile head-to-heads for Tin HiFi C0:
- Moondrop Quarks vs Tin HiFi C0
- KZ Taurus vs Tin HiFi C0
- KZ Taurus vs Tanchjim Zero Ultima
- Moondrop Quarks vs Tanchjim Zero Ultima
- KZ CRN vs Tin HiFi Huo
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 Zero Ultima: $19.99 Amazon eBay
Full Tanchjim Zero Ultima review and specifications →
| Back | Closed |
|---|---|
| Built-in Microphone | Yes |
| Connection | Wired |
| Deviation From Target | 1.95 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x dynamic |
| Form Factor | In-ear |
| Frequency Response | 10Hz - 48kHz (Manufacturer specified) |
| Harman Preference Score | 76 (median of 7 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 30 ohms |
| Sensitivity | 123 dB/V |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.6 dB at 30 Hz) |
| Tonal Tilt | +0.03 (negative is warmer, positive brighter) |
| Weight | 0 lbs (2.3 g) per earbud |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Tin HiFi C0: $19.99 Amazon eBay
Full Tin HiFi C0 review and specifications →
| Released | 2023 (3 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 1.81 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x dynamic |
| Form Factor | In-ear |
| Harman Preference Score | 77 (median of 14 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 32 ohms |
| Sensitivity | 105 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-4.0 dB at 30 Hz) |
| Tonal Tilt | +0.24 (negative is warmer, positive brighter) |
| Weight | 0 lbs (3.8 g) per earbud |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons