Short answer: the Penon Impact. It ranks #995 of 1369 in-ear headphones by sound quality, rated 3.2/5, at $2,499; the 64 Audio Volur ranks #1064, rated 3.0/5, at $2,499. Close enough in price that the sound-quality gap is the deciding factor.
Why pick the Penon Impact: A published AutoEQ preset corrects its response toward the Harman target, so a few minutes of EQ setup closes most of the gap. Watch for: Treble about 5 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
What the 64 Audio Volur does well: Two 9mm dynamic drivers deliver about 3 to 4 dB of extra sub-bass and bass in HypetheSonics’ measurement, still 2 dB above target at 30 Hz, so bass-heavy music has real depth and slam. The tradeoff: A 4.6 dB dip near 3.4 kHz and a 2.4 dB shortfall across 3 to 6 kHz push vocals back behind the bass.
Buy the Penon Impact. It is rated higher for sound quality than the 64 Audio Volur at the same price, which makes it the one to get unless you need something the other one does better.
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A published AutoEQ preset corrects its response toward the Harman target, so a few minutes of EQ setup closes most of the gap.
Penon Audio $2,499.00 eBay
Two 9mm dynamic drivers deliver about 3 to 4 dB of extra sub-bass and bass in HypetheSonics’ measurement, still 2 dB above target at 30 Hz, so bass-heavy music has real depth and slam.
64 Audio $2,499.00 eBayPrices on this page were last checked October 17, 2026 at 6:04 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
| Penon Impact | 64 Audio Volur | |
|---|---|---|
| Price | $2,499.00 | $2,499.00 |
| Ranked | #995 of 1369 in In-Ear Headphones | #1064 of 1369 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 64 (median of 4 squig.link measurements, calibrated to AutoEQ) | 62 (measured by HypetheSonics, via AutoEQ) |
| Deviation From Target | 2.87 dB standard deviation | 2.56 dB standard deviation |
| Tonal Tilt | -0.56 (negative is warmer, positive brighter) | -1.19 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.9 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+2.0 dB at 30 Hz) |
| Driver Type | Hybrid | Hybrid (2 dynamic + 8 balanced armature) |
| Drivers | 14 drivers (10 balanced armatures + 4 electrostatic drivers) | 2 x 9mm dynamic + 8 x balanced armature |
| Impedance | 21 ohms | 6.3 ohms |
| Sensitivity | 112 dB | 103 dB/mW |
| Frequency Response | 10Hz - 70kHz | 5Hz - 22kHz (Manufacturer specified) |
| Connection | Wired | Wired |
| 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 Penon Impact from ducbloke, eliseaudio, tgx78 and tonedeafmonk; the 64 Audio Volur from aden, adri-n, bloomaudio, ducbloke, ekaudio, elrics, hbb, precog, superreview, theaudiostore, tonedeafmonk, treblewellxtended, vsg and zerostresslevel, all via squig.link.
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