Short answer: the TRN Conch. It ranks #132 of 1291 in-ear headphones by sound quality, rated 4.4/5, at $29.99; the 7Hz Elua Ultra ranks #208, rated 4.3/5, and costs $31.49, which makes this an easy call rather than a real tradeoff.
The case for the TRN Conch: Fifteen hobbyist measurements on squig.link give the Conch a preference score of 79.0, a strong result for one of the cheapest in-ears around. The catch: Air above 10 kHz sits about 5.8 dB above target with a 6.7 dB peak near 8.1 kHz, so it can sound sharp and sibilant on bright recordings.
Why pick the 7Hz Elua Ultra: The median of 11 hobbyist measurements gives it a very good Harman preference score of 77 with a 1.42 dB spread, and its mids sit within about 0.5 dB of target, so vocals and instruments sound natural. The catch: A 4.1 dB peak near 11.9 kHz can make cymbals and sibilance sound sharp.
Buy the TRN Conch. It is rated higher for sound quality than the 7Hz Elua Ultra and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Still deciding? The full Headphones rankings cover every ranked option.
Fifteen hobbyist measurements on squig.link give the Conch a preference score of 79.0, a strong result for one of the cheapest in-ears around.
Amazon $29.99 eBay
The median of 11 hobbyist measurements gives it a very good Harman preference score of 77 with a 1.42 dB spread, and its mids sit within about 0.5 dB of target, so vocals and instruments sound natural.
Amazon $31.49 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
| TRN Conch | 7Hz Elua Ultra | |
|---|---|---|
| Price | $29.99 | $31.49 |
| Ranked | #132 of 1291 in In-Ear Headphones | #208 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 79 (median of 15 squig.link measurements, calibrated to AutoEQ) | 77 (median of 11 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.60 dB standard deviation | 1.42 dB standard deviation |
| Tonal Tilt | -0.15 (negative is warmer, positive brighter) | -0.64 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.6 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+2.3 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x dynamic | 1 x 10mm dynamic + 1 x 8mm dynamic |
| Impedance | 30 ohms | 19 ohms |
| Sensitivity | 114 dB | 108 dB/V |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) | 10Hz - 20kHz (Manufacturer specified) |
| Built-in Microphone | - | No |
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 Conch from ankramutt, audioamigo, bassyalexander, boizoff, csi-zone, enemyspider, eplv, fahryst, jaraba, obodio, pw, scboy, soundcheck39, soundignity and tonedeafmonk; the 7Hz Elua Ultra from aftersound, atechreviews, audioamigo, bassaudio, csi-zone, ducbloke, jaytiss, pw, soundcheck39, soundignity and vortexreviews, all via squig.link.
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