Short answer: the FiiO FH5s. Both are rated 4.1/5 for sound quality (#319 and #348 of 1291 in-ear headphones), and the FiiO FH5s costs $212.88 against $250.99 for the Binary Dynaquattro, so with nothing between them on sound quality, price settles it.
What the Binary Dynaquattro does well: Across 16 squig.link measurements this dynamic set earns a preference score of 74.7 with a smooth 1.71 dB deviation, one of the tidier results at its price. The tradeoff: A 5.4 dB dip near 6.1 kHz takes some edge off snare hits and consonants, and a 3.7 dB peak at 8.4 kHz right above it can make cymbals sound a little splashy.
What the FiiO FH5s does well: Crinacle’s measurement gives it a preference score of 75, and across seven hobbyist measurements on squig.link every band from 20 Hz to 16 kHz lands within 2 dB of the Harman target. The catch: A 6.6 dB peak near 8 kHz in the squig.link measurements can make cymbals and sibilant vocals sharp, followed by a 4.3 dB dip near 11.9 kHz that trims some air.
Buy the FiiO FH5s. Both are rated the same for sound quality, and it costs $38.11 less than the Binary Dynaquattro.
Still deciding? The full Headphones rankings cover every ranked option.
Across 16 squig.link measurements this dynamic set earns a preference score of 74.7 with a smooth 1.71 dB deviation, one of the tidier results at its price.
HiFiGo $250.99 eBay
Crinacle’s measurement gives it a preference score of 75, and across seven hobbyist measurements on squig.link every band from 20 Hz to 16 kHz lands within 2 dB of the Harman target.
Amazon $254.99 AliExpress $212.88 Lowest 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
| Binary Dynaquattro | FiiO FH5s | |
|---|---|---|
| Price | $250.99 | $212.88 |
| Ranked | #348 of 1291 in In-Ear Headphones | #319 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 75 (median of 16 squig.link measurements, calibrated to AutoEQ) | 75 (measured by crinacle, via AutoEQ) |
| Deviation From Target | 1.71 dB standard deviation | 2.01 dB standard deviation |
| Tonal Tilt | -0.65 (negative is warmer, positive brighter) | +0.34 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.7 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.4 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Hybrid (2 dynamic + 2 balanced armature) |
| Impedance | 23 ohms | 40 ohms |
| Sensitivity | 111 dB/Vrms | 106 dB/mW |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) | 10Hz - 40kHz (Manufacturer specified) |
| Drivers | - | 2 x dynamic (12mm + 6mm) + 2 x balanced armature |
| Weight | - | 0 lbs (8.8 g) per earbud |
| 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 Binary Dynaquattro from aftersound, atechreviews, audioamigo, awsmdanny, eliseaudio, elrics, gadgetgenerations, jaytiss, practiphile, pw, silicagel, sl0the, soundignity, superreview, theaudiostore, tonedeafmonk and treblewellxtended; the FiiO FH5s from dchpgall, jaytiss, precog, rg, superreview, tonedeafmonk and vsg, all via squig.link.
Related Headphone Comparisons
How FiiO FH5s compares with other leading options: