Short answer: the BASN Bmaster5. It ranks #665 of 1291 in-ear headphones by sound quality, rated 3.7/5, at $159.99; the FiiO FD15 ranks #720, rated 3.6/5, and costs $164.99, which makes this an easy call rather than a real tradeoff.
Why pick the BASN Bmaster5: A hybrid with a DLC dynamic driver and four balanced armatures. The tradeoff: Its score rests on three measurements.
Why pick the FiiO FD15: A large 13.8mm dynamic driver with 32 ohm impedance and 112 dB/mW sensitivity makes it easy to drive loud from a phone. Watch for: Presence sits 5.8 dB below target with an 8.4 dB dip at 6.5 kHz, so vocals lose clarity and cymbals sound dull, and treble from 6 to 10 kHz is down 4.1 dB as well.
Buy the BASN Bmaster5. It is rated higher for sound quality than the FiiO FD15 and costs less, so only choose the other one for a particular feature it does better.
Looking for alternatives? See the complete Headphones rankings.
A hybrid with a DLC dynamic driver and four balanced armatures.
Amazon $159.99 eBay
A large 13.8mm dynamic driver with 32 ohm impedance and 112 dB/mW sensitivity makes it easy to drive loud from a phone.
Amazon $164.99 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
| BASN Bmaster5 | FiiO FD15 | |
|---|---|---|
| Price | $159.99 | $164.99 |
| Ranked | #665 of 1291 in In-Ear Headphones | #720 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired |
| Driver Type | Hybrid | Dynamic |
| Drivers | 1 x 10mm dynamic + 4 x balanced armature | 1 x 13.8mm dynamic |
| Harman Preference Score | 70 (median of 3 squig.link measurements, calibrated to AutoEQ) | 69 (median of 7 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.24 dB standard deviation | 2.52 dB standard deviation |
| Tonal Tilt | -0.42 (negative is warmer, positive brighter) | -0.30 (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 (-3.9 dB at 30 Hz) |
| Impedance | - | 32 ohms |
| Sensitivity | - | 112 dB/mW |
| Weight | - | 0 lbs (12 g) per earbud |
| Frequency Response | - | 10Hz - 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 BASN Bmaster5 from audioamigo, bakkwatan and ducbloke; the FiiO FD15 from boizoff, breampike, ekaudio, iemocean, jaytiss, pw and timmyv, all via squig.link.
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