Short answer: the Symphonium Zenith. It ranks #301 of 1291 in-ear headphones by sound quality, rated 4.2/5, at $1,799. The Lime Ears Incognita ranks #369, rated 4.1/5, at $1,699, $100 cheaper, a saving that is not big enough to make up the sound-quality gap.
The case for the Symphonium Zenith: A four balanced armature flagship whose bass sits right on the Harman target, with full sub-bass to 20 Hz unusual for an all-BA IEM (score 76). Watch for: Treble sits about 3.6 dB below target, so it sounds relaxed and less detailed up top.
The case for the Lime Ears Incognita: A broadly balanced tuning with a preference score of 75 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.
Buy the Symphonium Zenith. It is rated higher for sound quality, and the $100 saving on the Lime Ears Incognita is not enough to make up the difference.
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A four balanced armature flagship whose bass sits right on the Harman target, with full sub-bass to 20 Hz unusual for an all-BA IEM (score 76).
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A broadly balanced tuning with a preference score of 75 against the Harman target.
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Specifications Side By Side
| Symphonium Zenith | Lime Ears Incognita | |
|---|---|---|
| Price | $1,799 | $1,699 |
| Ranked | #301 of 1291 in In-Ear Headphones | #369 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired |
| Driver Type | Balanced Armature | Hybrid |
| Drivers | 4 x balanced armature (TrueX 4-way crossover) | 1 x dynamic, 4 x balanced armature |
| Impedance | 6.1 ohms | - |
| Sensitivity | 108 dB/Vrms | - |
| Harman Preference Score | 76 (median of 3 squig.link measurements, calibrated to AutoEQ) | 75 (median of 7 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.64 dB standard deviation | 1.78 dB standard deviation |
| Tonal Tilt | -0.53 (negative is warmer, positive brighter) | -0.53 (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 (-0.7 dB at 30 Hz) |
| Frequency Response | 10Hz - 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 Symphonium Zenith from aden, aftersound and precog; the Lime Ears Incognita from animagus, audioamigo, ducbloke, eliseaudio, jaytiss, koi and pw, all via squig.link.
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