The 7Hz Eternal ranks #133 out of 238 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: 7Hz
Prices on this page were last checked October 10, 2026 at 5:37 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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#133 7Hz Eternal: $249.00 Linsoul eBay
Pros: Crinacle’s measurement gives it a preference score of 69, and squig.link measurements show bass, mids and upper mids all within about 1 dB of target, so voices and instruments sound natural. Treble rolls off gently, giving a smooth, unfatiguing sound for warm-leaning listeners. A 30 ohm, 109 dB/1kHz rating means a phone drives it easily, and each earbud weighs 6 g.
Cons: Treble above 6 kHz drops 3 to 4 dB below target with an 8.7 dB dip near 10.6 kHz, so cymbals lack sparkle and detail sounds dim. The IKKO OH10 and Etymotic ER2XR are rated higher for less money.
| Released | 2022 (4 years ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 2.63 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 14.5mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 10Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 69 (measured by crinacle, via AutoEQ) |
| Impedance | 30 ohms |
| Sensitivity | 109 dB/1kHz |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.1 dB at 30 Hz) |
| Tonal Tilt | -0.36 (negative is warmer, positive brighter) |
| Weight | 0 lbs (6 g) per earbud |
EQ preset to match the Harman target
Set a preamp of -6.4 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +1.0 dB | 0.70 |
| Peak | 184 Hz | -2.1 dB | 0.82 |
| Peak | 2,246 Hz | -3.5 dB | 2.16 |
| Peak | 812 Hz | +1.3 dB | 1.56 |
| Peak | 3,369 Hz | +2.6 dB | 3.21 |
| High shelf | 10,000 Hz | +6.4 dB | 0.70 |
| Peak | 6,115 Hz | +5.8 dB | 2.10 |
| Peak | 4,885 Hz | -8.3 dB | 4.79 |
| Peak | 8,865 Hz | +2.9 dB | 2.22 |
| Peak | 2,465 Hz | -0.4 dB | 2.69 |
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