Short answer: a tie on sound quality. Both are rated 4.5/5 (#83 and #72 of 450 in-ear headphones) at nearly the same price ($299.99 vs $296.65), so choose on features and fit.
The case for the Kiwi Ears Orchestra II: Seventeen hobbyist measurements on squig.link give its ten balanced armature drivers a preference score of 80.0, with bass, low mids and upper mids all within about 0.6 dB of target. Watch for: Presence and treble both sit roughly 3.5 dB below target with a 5.1 dB dip near 7.1 kHz, so attacks on piano and percussion can sound softened.
Buy the Binary Chopin or the Kiwi Ears Orchestra II on features: they are rated the same for sound quality at close to the same price.
Want more options? Browse the full Headphones rankings.
Specifications Side By Side
| Binary Chopin | Kiwi Ears Orchestra II | |
|---|---|---|
| Price | $299.99 | $296.65 |
| Ranked | #83 of 450 in In-Ear Headphones | #72 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 80 (median of 3 squig.link measurements, calibrated to AutoEQ) | 80 (median of 19 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.42 dB standard deviation | 1.38 dB standard deviation |
| Tonal Tilt | -0.35 (negative is warmer, positive brighter) | -0.39 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.0 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.9 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid (1 dynamic + 4 balanced armature) | Balanced armature |
| Drivers | 1 x 8mm dynamic + 4 x balanced armature | 10 x balanced armature |
| Impedance | 12 ohms | 15 ohms |
| Sensitivity | 122 dB/Vrms | 110 dB SPL/mW |
| Built-in Microphone | No | No |
| Frequency Response | - | 20Hz - 20kHz (Manufacturer specified) |
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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
Binary Chopin: $299.99 Hangout Audio eBay
Full Binary Chopin review and specifications →
| Released | Sep 2024 (2 years ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 1.42 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 4 balanced armature) |
| Drivers | 1 x 8mm dynamic + 4 x balanced armature |
| Form Factor | In-ear |
| Harman Preference Score | 80 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 12 ohms |
| Sensitivity | 122 dB/Vrms |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.0 dB at 30 Hz) |
| Tonal Tilt | -0.35 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Kiwi Ears Orchestra II: $296.65 Amazon eBay
Pros: Seventeen hobbyist measurements on squig.link give its ten balanced armature drivers a preference score of 80.0, with bass, low mids and upper mids all within about 0.6 dB of target. The air band lifts about 4.3 dB above 10 kHz, adding openness and a sense of space to orchestral and acoustic recordings. At 15 ohms and 110 dB/mW it runs comfortably from a phone.
Cons: Presence and treble both sit roughly 3.5 dB below target with a 5.1 dB dip near 7.1 kHz, so attacks on piano and percussion can sound softened. Sub-bass trails target by 1.3 dB, so it lacks some of the deep rumble of a good dynamic driver.
Full Kiwi Ears Orchestra II review and specifications →
| Released | Nov 2025 (11 months ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 1.38 dB standard deviation |
| Driver Type | Balanced armature |
| Drivers | 10 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 80 (median of 19 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 15 ohms |
| Sensitivity | 110 dB SPL/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.9 dB at 30 Hz) |
| Tonal Tilt | -0.39 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons