Short answer: a tie on sound quality. Both are rated 3.6/5 (#725 and #697 of 1291 in-ear headphones) at nearly the same price ($69.99 vs $68), so choose on features and fit.
What the NF Audio NA3 does well: A single dynamic IEM with a dual cavity design. Watch for: A 2.33 dB spread from the target shows peaks and dips that better tuned sets avoid.
Why pick the Sony WF-C510: In hobbyist measurements on squig.link it tracks the Harman target closely through the bass and mids, with a preference score of 69 and no peak above target between 1.5 and 12 kHz, so it never sounds harsh. The catch: There is no active noise cancelling, and codec support stops at SBC and AAC.
Buy the NF Audio NA3 or the Sony WF-C510 on features: they are rated the same for sound quality at close to the same price.
Looking for alternatives? See the complete Headphones rankings.
A single dynamic IEM with a dual cavity design.
Shenzhenaudio $69.99 eBay
In hobbyist measurements on squig.link it tracks the Harman target closely through the bass and mids, with a preference score of 69 and no peak above target between 1.5 and 12 kHz, so it never sounds harsh.
Amazon $68.00 Lowest Sony $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
| NF Audio NA3 | Sony WF-C510 | |
|---|---|---|
| Price | $69.99 | $68.00 |
| Ranked | #725 of 1291 in In-Ear Headphones | #697 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | True wireless |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x dynamic (dual cavity) | 1 x 6mm dynamic |
| Impedance | 32 ohms | - |
| Sensitivity | 105 dB | - |
| Harman Preference Score | 69 (median of 3 squig.link measurements, calibrated to AutoEQ) | 69 (median of 1 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.33 dB standard deviation | 2.47 dB standard deviation |
| Tonal Tilt | -0.48 (negative is warmer, positive brighter) | -0.30 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.4 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-4.4 dB at 30 Hz) |
| Weight | - | 0 lbs (4.6 g) per earbud |
| Frequency Response | - | 20Hz - 20kHz (Manufacturer specified) |
| Active Noise Cancelling | - | No |
| Battery Life | - | 11 hours (22 with case, Manufacturer specified) |
| Bluetooth Version | - | 5.3 |
| Bluetooth Codecs | - | SBC, AAC |
| Built-in Microphone | - | Yes |
| IP Rating | - | IPX4 |
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