Short answer: the NF Audio NA3. It ranks #725 of 1369 in-ear headphones by sound quality, rated 3.6/5, at $69.99; the Kinera Idun 2.0 ranks #864, rated 3.4/5, at $69. Close enough in price that the sound-quality gap is the deciding factor.
The case for the NF Audio NA3: A single dynamic IEM with a dual cavity design. The catch: A 2.33 dB spread from the target shows peaks and dips that better tuned sets avoid.
What the Kinera Idun 2.0 does well: A broadly balanced tuning with a preference score of 67 against the Harman target. The tradeoff: Treble about 4 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Buy the NF Audio NA3. It is rated higher for sound quality, and saving $0.99 with the Kinera Idun 2.0 does not make up for the sound-quality gap.
Looking for alternatives? See the complete Headphones rankings.
A single dynamic IEM with a dual cavity design.
Shenzhenaudio $69.99 eBay
A broadly balanced tuning with a preference score of 67 against the Harman target.
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Specifications Side By Side
| NF Audio NA3 | Kinera Idun 2.0 | |
|---|---|---|
| Price | $69.99 | 69.00 |
| Ranked | #725 of 1369 in In-Ear Headphones | #864 of 1369 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Hybrid |
| Drivers | 1 x dynamic (dual cavity) | 1 dynamic driver + 2 balanced armatures (7mm titanium dome DD + Knowles RAF-32873 BA + custom BTC-30095 BA) |
| Impedance | 32 ohms | 32 ohms |
| Sensitivity | 105 dB | 112 dB |
| Harman Preference Score | 69 (median of 3 squig.link measurements, calibrated to AutoEQ) | 67 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.33 dB standard deviation | 2.80 dB standard deviation |
| Tonal Tilt | -0.48 (negative is warmer, positive brighter) | +0.02 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.4 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-4.3 dB at 30 Hz) |
| Frequency Response | - | 20Hz - 20kHz |
Frequency Response Compared
Both headphones’ measurements overlaid on the Harman target. Above the target sounds louder in that range, below it quieter. Each curve is the median of several independent measurements, shifted so its 500 Hz to 2 kHz average sits at 0 dB, so only the tuning is compared.
Measurement data: the NF Audio NA3 from arn, ianfann, musicafe and vortexreviews; the Kinera Idun 2.0 from awsmdanny, precog and soundcheck39, all via squig.link.
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