Short answer: a tie on sound quality. Both are rated 4.2/5 (#269 and #309 of 1291 in-ear headphones) at nearly the same price ($199.99 vs $199), so choose on features and fit.
Why pick the 7Hz Timeless: In oratory1990’s measurement it earns a preference score of 76 with a low 1.9 dB deviation from target, so the overall balance stays close to what most listeners prefer. The tradeoff: A peak of about 8 dB near 11.9 kHz puts the air region almost 8 dB above target, which adds sparkle that some listeners will find splashy or fatiguing on bright recordings.
The case for the Acoustune HS1300SS: A broadly balanced tuning with a preference score of 76 against the Harman target. Watch for: An uneven response, 2.0 dB standard deviation from target.
Buy the 7Hz Timeless or the Acoustune HS1300SS on features: they are rated the same for sound quality at close to the same price.
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In oratory1990’s measurement it earns a preference score of 76 with a low 1.9 dB deviation from target, so the overall balance stays close to what most listeners prefer.
Linsoul $199.99 eBay
A broadly balanced tuning with a preference score of 76 against the Harman target.
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Specifications Side By Side
| 7Hz Timeless | Acoustune HS1300SS | |
|---|---|---|
| Price | $199.99 | $199 |
| Ranked | #269 of 1291 in In-Ear Headphones | #309 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 76 (measured by oratory1990, via AutoEQ) | 76 (median of 4 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.94 dB standard deviation | 2.00 dB standard deviation |
| Tonal Tilt | -0.27 (negative is warmer, positive brighter) | +0.02 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.3 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-2.5 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Planar magnetic | Dynamic |
| Drivers | 1 x 14.2mm planar magnetic | 1 x dynamic (Myrinx) |
| Impedance | 14.8 ohms | - |
| Sensitivity | 104 dB @ 1kHz | - |
| Frequency Response | 5Hz - 40kHz (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 7Hz Timeless from achoreviews, aden, aftersound, ankramutt, arn, atechreviews, audioamigo, bassyalexander, breampike, dchpgall, dentreviews, dl, eliseaudio, fahryst, filk, gadgetrytech, harpo, harutohiroki, hbb, hobbytalk, iemworld, koi, kr0mka, lown-fi, melatonin, mmagtech, musicafe, precog, pw, rg, soundcheck39, soundignity, superreview, tgx78, theaudiostore, therollo9, timmyv, treblewellxtended, vortexreviews and vsg; the Acoustune HS1300SS from aden, banzai1122, dchpgall and hu-fi, all via squig.link.
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