Short answer: the Hidizs MP145. Both are rated 3.7/5 for sound quality (#638 and #679 of 1291 in-ear headphones), and the Hidizs MP145 costs $159.99 against $169 for the ROSESELSA CJ20, and with sound quality even, the cheaper one is the better buy.
Why pick the Hidizs MP145: The median of 27 hobbyist measurements gives it a solid Harman preference score of 70 with a 2.16 dB spread, and its mids sit within about 0.6 dB of target, so vocals and instruments sound natural. The tradeoff: Presence sits about 3.9 dB low with a 4.7 dB dip near 3.6 kHz, so vocals and instruments lose some bite.
What the ROSESELSA CJ20 does well: A broadly balanced tuning with a preference score of 70 against the Harman target. The catch: An uneven response, 2.2 dB standard deviation from target.
Buy the Hidizs MP145. Both are rated the same for sound quality, and it costs $9.01 less than the ROSESELSA CJ20.
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The median of 27 hobbyist measurements gives it a solid Harman preference score of 70 with a 2.16 dB spread, and its mids sit within about 0.6 dB of target, so vocals and instruments sound natural.
Amazon $159.99 eBay
A broadly balanced tuning with a preference score of 70 against the Harman target.
HiFiGo $169 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
| Hidizs MP145 | ROSESELSA CJ20 | |
|---|---|---|
| Price | $159.99 | $169 |
| Ranked | #638 of 1291 in In-Ear Headphones | #679 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired (3.5mm) |
| Driver Type | Planar | Dynamic |
| Drivers | 1 x 14.5mm planar magnetic | 1 Dynamic (10mm topological) |
| Impedance | 30 ohms | - |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) | - |
| Weight | 0 lbs (9 g) | - |
| Harman Preference Score | 70 (median of 27 squig.link measurements, calibrated to AutoEQ) | 70 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.16 dB standard deviation | 2.15 dB standard deviation |
| Tonal Tilt | -0.59 (negative is warmer, positive brighter) | -0.47 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.1 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+2.3 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 Hidizs MP145 from achoreviews, aden, atechreviews, audioamigo, bedrock, boizoff, cammyfi, dchpgall, dl, eliseaudio, fahryst, hbb, hobbytalk, ianfann, jaytiss, kazi, lown-fi, practiphile, pw, rg, soundcheck39, soundignity, tdl, theaudiostore, therollo9, treblewellxtended and zerostresslevel; the ROSESELSA CJ20 from aftersound, atechreviews, audioamigo, hbb, jaytiss and lestat, all via squig.link.
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