Short answer: the Tanchjim Soda. Both are rated 4.7/5 for sound quality (#31 and #38 of 450 in-ear headphones), and the Tanchjim Soda costs $309.99 against $349.99 for the Moondrop Harmon, and with sound quality even, the cheaper one is the better buy.
The case for the Moondrop Harmon: Across 10 hobbyist measurements on squig.link it scores 82 for preference, with bass held within about half a decibel of target down to 20 Hz, so low end is clean and controlled. The catch: A deep 6.9 dB dip near 10.3 kHz and treble about 2 dB under target from 6 to 10 kHz make cymbals and acoustic detail sound subdued.
Why pick the Tanchjim Soda: Squig.link measurements, the median of 10 hobbyist samples, give it a preference score of 82, with bass within a decibel of target from 20 Hz and a gentle lift around 60 to 200 Hz for warmth. The tradeoff: The 3 to 6 kHz presence band sits nearly 3 dB under target, with a 3.8 dB dip near 5.6 kHz, so vocals and snare attack lose some bite, and the top octave rolls about 2 dB short, trimming airiness.
Buy the Tanchjim Soda. Both are rated the same for sound quality, and it costs $40 less than the Moondrop Harmon.
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Specifications Side By Side
| Moondrop Harmon | Tanchjim Soda | |
|---|---|---|
| Price | $349.99 | $309.99 |
| Ranked | #38 of 450 in In-Ear Headphones | #31 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 82 (median of 10 squig.link measurements, calibrated to AutoEQ) | 82 (median of 10 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.34 dB standard deviation | 1.32 dB standard deviation |
| Tonal Tilt | -0.26 (negative is warmer, positive brighter) | -0.13 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.1 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.6 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Hybrid (1 dynamic + 4 balanced armature) |
| Drivers | 3 x 10mm dynamic | 1 x 10mm dynamic + 4 x balanced armature |
| Impedance | 19 ohms | 15.5 ohms |
| Sensitivity | 114 dB/Vrms | 120 dB/Vrms |
| Frequency Response | 10Hz - 60kHz (Manufacturer specified) | 8Hz - 48kHz (Manufacturer specified) |
| Built-in Microphone | No | - |
Related Headphone Comparisons
More worthwhile head-to-heads for Tanchjim Soda:
- EPZ K9 vs Tanchjim Soda
- Tanchjim Soda vs Binary Chopin
- Moondrop Harmon vs Inawaken Twilight-DS
- EPZ K9 vs Moondrop Harmon
- IOAudio Sogno vs Moondrop Harmon
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
Moondrop Harmon: $349.99 Amazon eBay
Pros: Across 10 hobbyist measurements on squig.link it scores 82 for preference, with bass held within about half a decibel of target down to 20 Hz, so low end is clean and controlled. Three 10 mm dynamic drivers at 114 dB/Vrms play loudly from a phone. The slightly warm, relaxed tuning suits listeners who are sensitive to treble glare.
Cons: A deep 6.9 dB dip near 10.3 kHz and treble about 2 dB under target from 6 to 10 kHz make cymbals and acoustic detail sound subdued. Its rating sits below the IOAudio Sogno and AKG N5005 at a similar price, and there is no built-in microphone.
Full Moondrop Harmon review and specifications →
| Released | May 2025 (1 year ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 1.34 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 3 x 10mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 10Hz - 60kHz (Manufacturer specified) |
| Harman Preference Score | 82 (median of 10 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 19 ohms |
| Sensitivity | 114 dB/Vrms |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.1 dB at 30 Hz) |
| Tonal Tilt | -0.26 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Tanchjim Soda: $309.99 Amazon eBay
Pros: Squig.link measurements, the median of 10 hobbyist samples, give it a preference score of 82, with bass within a decibel of target from 20 Hz and a gentle lift around 60 to 200 Hz for warmth. The one dynamic plus four balanced armature hybrid at 120 dB/Vrms needs very little power, so a phone is enough. It suits listeners who like a warm, bass forward balance without exaggeration.
Cons: The 3 to 6 kHz presence band sits nearly 3 dB under target, with a 3.8 dB dip near 5.6 kHz, so vocals and snare attack lose some bite, and the top octave rolls about 2 dB short, trimming airiness. Its average deviation of about 1.3 dB is less even than the higher rated Tin HiFi T7, which sells for less.
Full Tanchjim Soda review and specifications →
| Released | Dec 2025 (10 months ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 1.32 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 4 balanced armature) |
| Drivers | 1 x 10mm dynamic + 4 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 8Hz - 48kHz (Manufacturer specified) |
| Harman Preference Score | 82 (median of 10 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 15.5 ohms |
| Sensitivity | 120 dB/Vrms |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.6 dB at 30 Hz) |
| Tonal Tilt | -0.13 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons