Short answer: the Twistura Delta. It ranks #856 of 1291 in-ear headphones by sound quality, rated 3.4/5, at $32.99; the FiiO FD11 ranks #908, rated 3.3/5, at $32.99. Close enough in price that the sound-quality gap is the deciding factor.
What the Twistura Delta does well: A broadly balanced tuning with a preference score of 67 against the Harman target. The catch: An uneven response, 2.3 dB standard deviation from target.
The case for the FiiO FD11: Bass is lifted about 3.6 dB with extension to 20 Hz, giving kick drums and bass lines extra weight. The tradeoff: Its 2.40 dB spread is less even than the best measured sets.
Buy the Twistura Delta. It is rated higher for sound quality than the FiiO FD11 at the same price, which makes it the one to get unless you need something the other one does better.
Want more options? Browse the full Headphones rankings.
A broadly balanced tuning with a preference score of 67 against the Harman target.
Twistura $32.99 eBay
Bass is lifted about 3.6 dB with extension to 20 Hz, giving kick drums and bass lines extra weight.
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Specifications Side By Side
| Twistura Delta | FiiO FD11 | |
|---|---|---|
| Price | $32.99 | $32.99 |
| Ranked | #856 of 1291 in In-Ear Headphones | #908 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 67 (median of 4 squig.link measurements, calibrated to AutoEQ) | 65 (median of 13 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.30 dB standard deviation | 2.40 dB standard deviation |
| Tonal Tilt | -0.74 (negative is warmer, positive brighter) | -0.89 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.0 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+0.8 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 10mm dual-magnet dynamic driver (LCP diaphragm) | 1 x 10mm dynamic |
| Impedance | 42 ohms | 24 ohms |
| Sensitivity | 120 dB/Vrms | 111 dB/mW |
| Frequency Response | 8Hz - 21kHz | 20Hz - 40kHz (Manufacturer specified) |
| Weight | - | 0 lbs (10 g) |
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 Twistura Delta from audioamigo, boizoff, theaudiostore and tonedeafmonk; the FiiO FD11 from adri-n, aftersound, ankramutt, arn, dchpgall, digaoreviews, ekaudio, fahryst, ianfann, mmagtech, superreview, theaudiostore and treblewellxtended, all via squig.link.
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