Short answer: the Oriveti OD200. It ranks #936 of 1291 in-ear headphones by sound quality, rated 3.3/5, at $199; the NF Acous NM25 ranks #954, rated 3.2/5, at $199. With prices this close, go by the sound-quality ranking rather than the cost.
The case for the Oriveti OD200: A published AutoEQ preset corrects its response toward the Harman target, so a few minutes of EQ setup closes most of the gap. The tradeoff: Treble about 2 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
The case for the NF Acous NM25: A single dynamic driver earphone with a bright, detailed character that suits V-shaped and neutral listeners, with a low end that stays within 6 dB of target down to 20 Hz. The tradeoff: Treble runs about 6 dB above target from 6 to 16 kHz, peaking 12.3 dB near 11.2 kHz in the median of 7 hobbyist measurements on squig.link, so cymbals, hi-hats and sibilance can sound hot and fatiguing at higher volume.
Buy the Oriveti OD200. It is rated higher for sound quality than the NF Acous NM25 at the same price, 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.
A published AutoEQ preset corrects its response toward the Harman target, so a few minutes of EQ setup closes most of the gap.
Amazon $199 eBay
A single dynamic driver earphone with a bright, detailed character that suits V-shaped and neutral listeners, with a low end that stays within 6 dB of target down to 20 Hz.
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Specifications Side By Side
| Oriveti OD200 | NF Acous NM25 | |
|---|---|---|
| Price | $199 | $199.00 |
| Ranked | #936 of 1291 in In-Ear Headphones | #954 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 65 (median of 4 squig.link measurements, calibrated to AutoEQ) | 64 (median of 7 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 3.06 dB standard deviation | 2.42 dB standard deviation |
| Tonal Tilt | -0.07 (negative is warmer, positive brighter) | +0.93 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-5.1 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.5 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 9.8mm beryllium-coated dynamic driver | 1 x dynamic |
| Impedance | 16 ohms | 32 ohms |
| Sensitivity | 108 ±3 dB/mW | 108 dB/mW |
| Frequency Response | 20Hz - 20kHz | - |
| Weight | Not specified | - |
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 Oriveti OD200 from animagus, dl, jaytiss and tonedeafmonk; the NF Acous NM25 from cqtek, digaoreviews, faxepremium, musicafe, practiphile, pw, tonedeafmonk and treblewellxtended, all via squig.link.
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