Short answer: the Binary EP321. It ranks #181 of 450 in-ear headphones by sound quality, rated 4.2/5, at $309.99; the ZiiGaat Horizon ranks #229, rated 4.1/5, and costs $312.55, so there is little reason to consider the other one.
Buy the Binary EP321. It is rated higher for sound quality than the ZiiGaat Horizon and costs less, which makes it the one to get unless you need something the other one does better.
Still deciding? The full Headphones rankings cover every ranked option.
Specifications Side By Side
| Binary EP321 | ZiiGaat Horizon | |
|---|---|---|
| Price | $309.99 | $312.55 |
| Ranked | #181 of 450 in In-Ear Headphones | #229 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 77 (median of 3 squig.link measurements, calibrated to AutoEQ) | 75 (median of 18 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.61 dB standard deviation | 1.66 dB standard deviation |
| Tonal Tilt | -0.46 (negative is warmer, positive brighter) | -0.42 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.7 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.7 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid (1 dynamic + 1 passive radiator + 3 balanced armature + 1 MEMS) | Hybrid (1 dynamic + 2 balanced armature + 2 planar magnetic) |
| Drivers | 1 x 10mm dynamic + 1 x 6mm passive radiator + 3 x balanced armature + 1 x MEMS | 1 x 10mm dynamic + 2 x balanced armature + 2 x planar magnetic |
| Impedance | 13 ohms | 24 ohms |
| Sensitivity | 122 dB SPL/V | 102 dB |
| Weight | 0 lbs (7.5 g) | - |
| Frequency Response | 8Hz - 40kHz (Manufacturer specified) | 20Hz - 35kHz (Manufacturer specified) |
| Built-in Microphone | No | - |
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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 EP321: $309.99 Amazon eBay
Full Binary EP321 review and specifications →
| Released | Feb 2026 (8 months ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 1.61 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 1 passive radiator + 3 balanced armature + 1 MEMS) |
| Drivers | 1 x 10mm dynamic + 1 x 6mm passive radiator + 3 x balanced armature + 1 x MEMS |
| Form Factor | In-ear |
| Frequency Response | 8Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 77 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 13 ohms |
| Sensitivity | 122 dB SPL/V |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.7 dB at 30 Hz) |
| Tonal Tilt | -0.46 (negative is warmer, positive brighter) |
| Weight | 0 lbs (7.5 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
ZiiGaat Horizon: $312.55 Amazon eBay
Full ZiiGaat Horizon review and specifications →
| Released | Oct 2025 (1 year ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 1.66 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 2 balanced armature + 2 planar magnetic) |
| Drivers | 1 x 10mm dynamic + 2 x balanced armature + 2 x planar magnetic |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 35kHz (Manufacturer specified) |
| Harman Preference Score | 75 (median of 18 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 24 ohms |
| Sensitivity | 102 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.7 dB at 30 Hz) |
| Tonal Tilt | -0.42 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons