Short answer: the AFUL Cantor. It ranks #176 of 1291 in-ear headphones by sound quality, rated 4.4/5, at $790.99; the 7th Acoustics Supernova ranks #228, rated 4.3/5, and costs $849, so there is little reason to consider the other one.
Why pick the AFUL Cantor: A flagship 14 armature IEM with smooth, even measurements, a Harman score of 78 and bass on target down to 20 Hz. The catch: Presence sits about 4 dB low with a 5.2 dB dip near 3.7 kHz, which softens vocal bite and attack, and a 3.1 dB peak near 12 kHz can add some sharpness.
What the 7th Acoustics Supernova does well: The median of 32 hobbyist measurements gives it a very good Harman preference score of 77 with a 1.68 dB spread, and its mids sit within about 0.8 dB of target, so vocals and instruments sound natural. Watch for: Presence sits about 4.1 dB low with a 4.8 dB dip near 3.6 kHz, so vocals and instruments lose some bite.
Buy the AFUL Cantor. It is rated higher for sound quality than the 7th Acoustics Supernova and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
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A flagship 14 armature IEM with smooth, even measurements, a Harman score of 78 and bass on target down to 20 Hz.
HiFiGo $790.99 eBay
The median of 32 hobbyist measurements gives it a very good Harman preference score of 77 with a 1.68 dB spread, and its mids sit within about 0.8 dB of target, so vocals and instruments sound natural.
Bloom Audio $849.00 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
| AFUL Cantor | 7th Acoustics Supernova | |
|---|---|---|
| Price | $790.99 | $849.00 |
| Ranked | #176 of 1291 in In-Ear Headphones | #228 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired |
| Driver Type | Balanced armature | Balanced armature |
| Drivers | 14 x balanced armature | 6 x balanced armature |
| Impedance | 20 ohms | 15 ohms |
| Frequency Response | 5Hz - 35kHz | - |
| Harman Preference Score | 78 (median of 24 squig.link measurements, calibrated to AutoEQ) | 77 (median of 32 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.58 dB standard deviation | 1.68 dB standard deviation |
| Tonal Tilt | -0.39 (negative is warmer, positive brighter) | -0.28 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.5 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.6 dB at 30 Hz) |
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 AFUL Cantor from aden, adri-n, atechreviews, audioamigo, boizoff, dl, eliseaudio, elrics, gadgetgenerations, gadgetrytech, hu-fi, jaytiss, koi, lown-fi, practiphile, precog, pw, scboy, silicagel, sl0the, superreview, theaudiostore, tonedeafmonk and treblewellxtended; the 7th Acoustics Supernova from adri-n, aftersound, animagus, aquaphobic, bassaudio, bloomaudio, dentreviews, dvewlsh, eliseaudio, freeryder05, gadgetgenerations, hadoe, hbb, ianfann, jaytiss, lestat, loomynarty, lown-fi, mmagtech, nymz, obodio, practiphile, precog, ragnarok, recode, sl0the, smirk, soundignity, superreview, tedthepraimortis, timmyv and treblewellxtended, all via squig.link.
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