Short answer: the Ooopusx OP24. It ranks #97 of 1291 in-ear headphones by sound quality, rated 4.5/5, at $49.99; the KZ PR2 ranks #159, rated 4.4/5, and costs $53.95, so there is not much of a tradeoff to weigh.
What the Ooopusx OP24 does well: Its six-driver hybrid scores 80.0 across 11 hobbyist measurements on squig.link, and sub-bass and bass both sit nearly 2 dB above target, giving electronic and hip hop tracks a full, rumbling low end. The catch: A 5.8 dB peak near 8.1 kHz can make cymbals and esses sound splashy on bright recordings.
The case for the KZ PR2: Its 13.2 mm planar driver scores 78.8 in the median of 13 squig.link measurements, with bass and mids held within about 1 dB of target from 20 Hz to 3 kHz. Watch for: At 94 dB sensitivity it needs noticeably more volume than most in-ears, so weak phone outputs may run out of headroom.
Buy the Ooopusx OP24. It is rated higher for sound quality than the KZ PR2 and costs less, so only choose the other one for a particular feature it does better.
Still deciding? The full Headphones rankings cover every ranked option.
Its six-driver hybrid scores 80.0 across 11 hobbyist measurements on squig.link, and sub-bass and bass both sit nearly 2 dB above target, giving electronic and hip hop tracks a full, rumbling low end.
Amazon $49.99 eBay
Its 13.2 mm planar driver scores 78.8 in the median of 13 squig.link measurements, with bass and mids held within about 1 dB of target from 20 Hz to 3 kHz.
Amazon $53.95 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Ooopusx OP24 | KZ PR2 | |
|---|---|---|
| Price | $49.99 | $53.95 |
| Ranked | #97 of 1291 in In-Ear Headphones | #159 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 80 (median of 13 squig.link measurements, calibrated to AutoEQ) | 78 (median of 31 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.44 dB standard deviation | 1.65 dB standard deviation |
| Tonal Tilt | -0.32 (negative is warmer, positive brighter) | -0.18 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.3 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+1.5 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid (2 dynamic + 4 balanced armature) | Planar magnetic |
| Drivers | 2 x dynamic + 4 x balanced armature | 1 x 13.2mm planar magnetic |
| Impedance | 15 ohms (27 ohms in mode 2) | 15 ohms |
| Sensitivity | 127 dB/Vrms | 94 dB |
| Frequency Response | 10Hz - 40kHz (Manufacturer specified) | 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 Ooopusx OP24 from audioamigo, bedrock, boizoff, csi-zone, digaoreviews, enemyspider, hu-fi, jaytiss, kazi, practiphile, silicagel, soundignity and superreview; the KZ PR2 from aftersound, ankramutt, arn, audioamigo, bakkwatan, bassaudio, bassyalexander, breampike, cammyfi, csi-zone, dchpgall, enemyspider, eplv, fahryst, harpo, hbb, hobbytalk, hore, hu-fi, ianfann, isaiahse, kuping-sensi, melatonin, mmagtech, musicafe, pw, scboy, soundcheck39, soundignity, superreview and therollo9, all via squig.link.
Related Headphone Comparisons
How Ooopusx OP24 compares with other leading options: