Short answer: a tie on sound quality. Both are rated 4.9/5 (#19 and #23 of 1291 in-ear headphones) at nearly the same price ($73.09 vs $69.99), so choose on features and fit.
What the EPZ Q5 Pro does well: The median of 17 hobbyist measurements gives it an excellent Harman preference score of 85 with a 0.95 dB spread, and its mids sit within about 0.5 dB of target, so vocals and instruments sound natural. The catch: Its 0.95 dB spread is less even than the best measured sets.
The case for the Truthear Zero Blue 2: The Zero Blue 2 uses two dynamic drivers and, across fourteen hobbyist measurements on squig.link, scores 85 for preference with about 1 dB of unevenness. The tradeoff: The air band runs about 3.9 dB above target and a 4.5 dB peak sits near 8.1 kHz, which can make sibilance and cymbals stand out on bright mixes.
Buy the EPZ Q5 Pro or the Truthear Zero Blue 2 on features: they are rated the same for sound quality at close to the same price.
Looking for alternatives? See the complete Headphones rankings.
The median of 17 hobbyist measurements gives it an excellent Harman preference score of 85 with a 0.95 dB spread, and its mids sit within about 0.5 dB of target, so vocals and instruments sound natural.
AliExpress $73.09 eBay
The Zero Blue 2 uses two dynamic drivers and, across fourteen hobbyist measurements on squig.link, scores 85 for preference with about 1 dB of unevenness.
Amazon $69.99 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
| EPZ Q5 Pro | Truthear Zero Blue 2 | |
|---|---|---|
| Price | $73.09 | $69.99 |
| Ranked | #19 of 1291 in In-Ear Headphones | #23 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 10mm dynamic | 1 x 10mm dynamic + 1 x 7.8mm dynamic |
| Impedance | 24 ohms | 5.8 ohms |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) | 9Hz - 41kHz (Manufacturer specified) |
| Harman Preference Score | 85 (median of 17 squig.link measurements, calibrated to AutoEQ) | 84 (median of 18 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 0.95 dB standard deviation | 1.04 dB standard deviation |
| Tonal Tilt | -0.18 (negative is warmer, positive brighter) | -0.28 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.5 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+1.6 dB at 30 Hz) |
| Sensitivity | - | 119.5 dB/Vrms |
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 EPZ Q5 Pro from aftersound, awsmdanny, dl, fahryst, hobbytalk, iemworld, koi, kuping-sensi, musicafe, obodio, practiphile, pw, soundcheck39, soundignity, suporsalad, tonedeafmonk and vortexreviews; the Truthear Zero Blue 2 from aden, aquaphobic, arn, banzai1122, bassaudio, bassyalexander, bedrock, boizoff, doltonius, gadgetrytech, hobbytalk, kazi, koi, listener, practiphile, therollo9, treblewellxtended and vortexreviews, all via squig.link.
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