Short answer: a tie on sound quality. Both are rated 3.3/5 (#929 and #894 of 1291 in-ear headphones) at nearly the same price ($79.99 vs $79), so choose on features and fit.
Why pick the Activo Volcano: A broadly balanced tuning with a preference score of 65 against the Harman target. The tradeoff: Treble about 4 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Why pick the Hidizs MK12 Turris: A broadly balanced tuning with a preference score of 66 against the Harman target. The catch: Treble about 4 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Buy the Activo Volcano or the Hidizs MK12 Turris on features: they are rated the same for sound quality at close to the same price.
Want more options? Browse the full Headphones rankings.
A broadly balanced tuning with a preference score of 65 against the Harman target.
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A broadly balanced tuning with a preference score of 66 against the Harman target.
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Specifications Side By Side
| Activo Volcano | Hidizs MK12 Turris | |
|---|---|---|
| Price | $79.99 | 79.00 |
| Ranked | #929 of 1291 in In-Ear Headphones | #894 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 65 (median of 3 squig.link measurements, calibrated to AutoEQ) | 66 (median of 6 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 3.02 dB standard deviation | 2.76 dB standard deviation |
| Tonal Tilt | -0.07 (negative is warmer, positive brighter) | -0.36 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-5.4 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-2.9 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 3 dynamic drivers (1 x 8mm DD + 2 x 6mm DD) | 1 x 12mm dynamic driver (91% pure magnesium dome) |
| Impedance | 16 ohms | 32 ohms |
| Sensitivity | 100 dB/mW | 111 dB |
| Frequency Response | 20Hz - 20kHz | 10Hz - 45,000Hz |
| Weight | Lightweight PC shell | - |
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 Activo Volcano from aden, audioamigo and digaoreviews; the Hidizs MK12 Turris from awsmdanny, joycesreview, kazi, koi, practiphile and suporsalad, all via squig.link.
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