Short answer: the EPZ P50. Both are rated 4.2/5 for sound quality (#251 and #309 of 1291 in-ear headphones), and the EPZ P50 costs $189.99 against $199 for the Acoustune HS1300SS, and with sound quality even, the cheaper one is the better buy.
Why pick the Acoustune HS1300SS: A broadly balanced tuning with a preference score of 76 against the Harman target. The catch: An uneven response, 2.0 dB standard deviation from target.
What the EPZ P50 does well: The median of 28 hobbyist measurements gives it a very good Harman preference score of 77 with a 1.56 dB spread, and its mids sit within about 1.3 dB of target, so vocals and instruments sound natural. The tradeoff: Presence sits about 3.1 dB low with a 6.2 dB dip near 6.7 kHz, so vocals and instruments lose some bite.
Buy the EPZ P50. Both are rated the same for sound quality, and it costs $9.01 less than the Acoustune HS1300SS.
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A broadly balanced tuning with a preference score of 76 against the Harman target.
Zeppelin & Co eBay
The median of 28 hobbyist measurements gives it a very good Harman preference score of 77 with a 1.56 dB spread, and its mids sit within about 1.3 dB of target, so vocals and instruments sound natural.
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Specifications Side By Side
| Acoustune HS1300SS | EPZ P50 | |
|---|---|---|
| Price | $199 | $189.99 |
| Ranked | #309 of 1291 in In-Ear Headphones | #251 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 76 (median of 4 squig.link measurements, calibrated to AutoEQ) | 77 (median of 28 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.00 dB standard deviation | 1.56 dB standard deviation |
| Tonal Tilt | +0.02 (negative is warmer, positive brighter) | -0.34 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.5 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.9 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Hybrid (1 dynamic + 2 balanced armature + 2 planar) |
| Drivers | 1 x dynamic (Myrinx) | 1 x 10mm dynamic + 2 x balanced armature + 2 x planar |
| Impedance | - | 20 ohms |
| Sensitivity | - | 106 dB |
| Frequency Response | - | 20Hz - 40kHz (Manufacturer specified) |
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 Acoustune HS1300SS from aden, banzai1122, dchpgall and hu-fi; the EPZ P50 from aden, aftersound, atechreviews, audioamigo, bassaudio, boizoff, dl, ducbloke, fahryst, fernandagunsan, gadgetrytech, harutohiroki, hbb, hobbytalk, jaytiss, koi, kuping-sensi, lumerion, musicafe, practiphile, precog, pw, scboy, sl0the, soundcheck39, soundignity, superreview and tonedeafmonk, all via squig.link.
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