Short answer: the TRN TA4. It ranks #905 of 1369 in-ear headphones by sound quality, rated 3.4/5, at $6; the FiiO x JadeAudio JD1 ranks #943, rated 3.3/5, and costs $29.90, which makes this an easy call rather than a real tradeoff.
What the TRN TA4 does well: A broadly balanced tuning with a preference score of 66 against the Harman target. The catch: Treble about 3 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Why pick the FiiO x JadeAudio JD1: A broadly balanced tuning with a preference score of 65 against the Harman target. The tradeoff: An uneven response, 2.4 dB standard deviation from target.
Buy the TRN TA4. It is rated higher for sound quality than the FiiO x JadeAudio JD1 and costs less, so only choose the other one for a particular feature it does better.
Looking for alternatives? See the complete Headphones rankings.
A broadly balanced tuning with a preference score of 66 against the Harman target.
TRN eBay
A broadly balanced tuning with a preference score of 65 against the Harman target.
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Specifications Side By Side
| TRN TA4 | FiiO x JadeAudio JD1 | |
|---|---|---|
| Price | 6.00 | $29.90 |
| Ranked | #905 of 1369 in In-Ear Headphones | #943 of 1369 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 66 (median of 4 squig.link measurements, calibrated to AutoEQ) | 65 (median of 4 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.82 dB standard deviation | 2.37 dB standard deviation |
| Tonal Tilt | -0.21 (negative is warmer, positive brighter) | -0.72 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.8 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+2.9 dB at 30 Hz) |
| Driver Type | Hybrid | Dynamic |
| Drivers | 2 dynamic drivers + 2 balanced armatures (10mm beryllium DD + 6mm titanium DD + dual Knowles 33518 BA) | 1 x 10mm LCP (Liquid Crystal Polymer) dynamic driver |
| Impedance | 20 ohms | 24 ohms |
| Sensitivity | 105 dB | 109 dB/mW |
| Frequency Response | 20Hz - 40kHz | 20Hz - 20,000Hz |
| Connection | Wired | Wired |
| Weight | - | 0 lbs (7 g) (per earpiece) |
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 TRN TA4 from arn, eplv, ianfann and tonedeafmonk; the FiiO x JadeAudio JD1 from boizoff, dchpgall, ianfann and jaytiss, all via squig.link.
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