Short answer: the DUNU x Gizaudio DaVinci. Both are rated 3.4/5 for sound quality (#849 and #857 of 1291 in-ear headphones), and the DUNU x Gizaudio DaVinci costs $290.99 against $299 for the Penon Serial, with sound quality a draw, the lower price decides it.
What the DUNU x Gizaudio DaVinci does well: Bass sits close to target and holds down to 20 Hz, so low end sounds full without bloat. The tradeoff: Presence sits about 4.7 dB low with an 8.1 dB dip near 6.1 kHz, so vocals and instruments lose some bite.
What the Penon Serial does well: A broadly balanced tuning with a preference score of 67 against the Harman target. Watch for: Treble about 4 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Buy the DUNU x Gizaudio DaVinci. Both are rated the same for sound quality, and it costs $8.01 less than the Penon Serial.
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Bass sits close to target and holds down to 20 Hz, so low end sounds full without bloat.
HiFiGo $290.99 eBay
A broadly balanced tuning with a preference score of 67 against the Harman target.
Penon Audio $299.00 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
| DUNU x Gizaudio DaVinci | Penon Serial | |
|---|---|---|
| Price | $290.99 | $299.00 |
| Ranked | #849 of 1291 in In-Ear Headphones | #857 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 + 1 x 8mm dynamic + 4 x balanced armature | 3 x dynamic drivers (10mm bio-diaphragm + 8mm titanium-plated + 6mm PU) |
| Impedance | 35 ohms | 18 ohms |
| Sensitivity | 109 dB/mW | 103 dB |
| Frequency Response | 5Hz - 40kHz (Manufacturer specified) | 20Hz - 20kHz |
| Weight | 0 lbs (6.6 g) | - |
| Harman Preference Score | 67 (median of 33 squig.link measurements, calibrated to AutoEQ) | 67 (median of 7 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.24 dB standard deviation | 2.44 dB standard deviation |
| Tonal Tilt | -0.98 (negative is warmer, positive brighter) | -0.68 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.6 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.5 dB at 30 Hz) |
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 DUNU x Gizaudio DaVinci from aden, atechreviews, audioamigo, awsmdanny, boizoff, bryaudioreviews, cammyfi, dl, doltonius, ducbloke, eliseaudio, freeryder05, gadgetrytech, hobbytalk, iemocean, jaytiss, kazi, koi, lestat, listener, obodio, precog, pw, silicagel, sl0the, soundcheck39, soundignity, superreview, suporsalad, theaudiostore, timmyv, tonedeafmonk, treblewellxtended and zerostresslevel; the Penon Serial from dl, harpo, hbb, jaytiss, mmagtech, nymz and tgx78, all via squig.link.
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