Short answer: a tie on sound quality. Both are rated 4.7/5 (#26 and #36 of 450 in-ear headphones) at nearly the same price ($22.99 vs $21.99), so choose on features and fit.
What the Aoshida E20 does well: Across six hobbyist measurements on squig.link, the E20 reaches a preference score of 82.6 with a smooth 1.13 dB deviation from target. Watch for: A 6 dB peak near 8.4 kHz and treble about 2.1 dB above target from 6 to 10 kHz can make sibilance and hi hats sound sharp on bright recordings.
What the KZ EDZ does well: The EDZ is an inexpensive single dynamic driver set that scores 82 for preference in the median of six hobbyist measurements on squig.link. The tradeoff: Sub-bass falls about 2.3 dB below target, so deep synth and kick drum rumble is lighter than ideal, and the presence region is about 2.2 dB recessed with a dip near 6.3 kHz.
Buy the Aoshida E20 or the KZ EDZ 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
| Aoshida E20 | KZ EDZ | |
|---|---|---|
| Price | $22.99 | $21.99 |
| Ranked | #26 of 450 in In-Ear Headphones | #36 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 83 (median of 6 squig.link measurements, calibrated to AutoEQ) | 82 (median of 6 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.13 dB standard deviation | 1.37 dB standard deviation |
| Tonal Tilt | +0.26 (negative is warmer, positive brighter) | +0.08 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.8 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-2.4 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 10mm dynamic + 1 x 8mm dynamic | 1 x dynamic |
| Impedance | 12 ohms | 24 ohms |
| Sensitivity | 98 dB | 107 dB/mW |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) | 7Hz - 45kHz (Manufacturer specified) |
Related Headphone Comparisons
How Aoshida E20 compares with other leading options:
- EPZ G10 vs Aoshida E20
- CCA Trio vs Aoshida E20
- Aoshida E20 vs Truthear Hexa
- Aoshida E20 vs Simgot EW200
- Aoshida E20 vs KZ Gale
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
Aoshida E20: $22.99 Amazon eBay
Pros: Across six hobbyist measurements on squig.link, the E20 reaches a preference score of 82.6 with a smooth 1.13 dB deviation from target. Sub-bass sits within a decibel of target down to 30 Hz, and the mids stay within about 1 dB, so vocals sound natural with solid bass underneath. Its dual dynamic driver design and budget price make it a sensible pick for warm or mildly V shaped tastes.
Cons: A 6 dB peak near 8.4 kHz and treble about 2.1 dB above target from 6 to 10 kHz can make sibilance and hi hats sound sharp on bright recordings. Bass from 60 to 200 Hz runs about 1 dB lean, so it has less punch than bass focused alternatives. It is rated level with similarly priced rivals such as the KZ EDZ and DDHiFi Janus 3 rather than above them.
Full Aoshida E20 review and specifications →
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 1.13 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 10mm dynamic + 1 x 8mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 83 (median of 6 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 12 ohms |
| Sensitivity | 98 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.8 dB at 30 Hz) |
| Tonal Tilt | +0.26 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
KZ EDZ: $21.99 Amazon eBay
Pros: The EDZ is an inexpensive single dynamic driver set that scores 82 for preference in the median of six hobbyist measurements on squig.link. Bass, low mids and upper mids stay within half a dB of target, and the largest treble peak is only about 3 dB, so it sounds even and fatigue free. Its 107 dB/mW sensitivity makes it easy to drive from any phone.
Cons: Sub-bass falls about 2.3 dB below target, so deep synth and kick drum rumble is lighter than ideal, and the presence region is about 2.2 dB recessed with a dip near 6.3 kHz. The KZ Gale and Aoshida E20 earn the same rating at a similar price.
Full KZ EDZ review and specifications →
| Released | Jan 2026 (9 months ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 1.37 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x dynamic |
| Form Factor | In-ear |
| Frequency Response | 7Hz - 45kHz (Manufacturer specified) |
| Harman Preference Score | 82 (median of 6 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 24 ohms |
| Sensitivity | 107 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.4 dB at 30 Hz) |
| Tonal Tilt | +0.08 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons