Short answer: the NF Audio RA15. Both are rated 4.0/5 for sound quality (#409 and #381 of 1291 in-ear headphones), and the NF Audio RA15 costs $89 against $94.99 for the Juzear Defiant, and with sound quality even, the cheaper one is the better buy.
What the Juzear Defiant does well: One dynamic driver and three balanced armatures keep bass almost exactly on target, within 0.5 dB from 20 to 200 Hz in squig.link hobbyist measurements, so low end sounds clean and full without bloat. The tradeoff: Presence around 3 to 6 kHz falls about 4.4 dB below target with a 6.4 dB dip near 6 kHz, which pushes vocals and guitar attack back and makes the sound feel veiled in the center.
What the NF Audio RA15 does well: The median of 10 hobbyist measurements gives it a solid Harman preference score of 74 with a 2.12 dB spread, and its mids sit within about 1.2 dB of target, so vocals and instruments sound natural. Watch for: A 7.3 dB peak near 8.2 kHz can make cymbals and sibilance sound sharp.
Buy the NF Audio RA15. Both are rated the same for sound quality, and it costs $5.99 less than the Juzear Defiant.
Still deciding? The full Headphones rankings cover every ranked option.
One dynamic driver and three balanced armatures keep bass almost exactly on target, within 0.5 dB from 20 to 200 Hz in squig.link hobbyist measurements, so low end sounds clean and full without bloat.
Amazon $94.99 eBay
The median of 10 hobbyist measurements gives it a solid Harman preference score of 74 with a 2.12 dB spread, and its mids sit within about 1.2 dB of target, so vocals and instruments sound natural.
Amazon $89.00 eBayPrices on this page were last checked October 16, 2026 at 5:46 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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Specifications Side By Side
| Juzear Defiant | NF Audio RA15 | |
|---|---|---|
| Price | $94.99 | $89.00 |
| Ranked | #381 of 1291 in In-Ear Headphones | #409 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 74 (median of 22 squig.link measurements, calibrated to AutoEQ) | 74 (median of 10 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.80 dB standard deviation | 2.12 dB standard deviation |
| Tonal Tilt | -0.67 (negative is warmer, positive brighter) | +0.03 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.6 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.7 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid (1 dynamic + 3 balanced armature) | Dynamic |
| Drivers | 1 x dynamic + 3 x balanced armature | 1 x dynamic |
| Impedance | 32 ohms | 32 ohms |
| Sensitivity | 109 dB | 108 dB/mW |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) | 10Hz - 40kHz (Manufacturer specified) |
| Weight | - | 0 lbs (9 g) per earbud |
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 Juzear Defiant from aden, aftersound, awsmdanny, bassaudio, bedrock, boizoff, doltonius, ducbloke, enemyspider, eplv, fernandagunsan, flare, hbb, iemocean, kuping-sensi, lumerion, practiphile, precog, soundcheck39, timmyv, tonedeafmonk and treblewellxtended; the NF Audio RA15 from achoreviews, hu-fi, musicafe, obodio, pw, silicagel, superreview, therollo9, tonedeafmonk and vortexreviews, all via squig.link.
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