The Penon Serial ranks #857 out of 1291 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: Penon
Prices 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.
#857 Penon Serial: $299.00 Penon Audio $299.00 eBay
Pros: A broadly balanced tuning with a preference score of 67 against the Harman target.
Cons: Treble about 4 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones. An uneven response, 2.4 dB standard deviation from target.
Is the Penon Serial right for you?
Buy it if
- you are sensitive to bright or sharp treble (treble sits 4.1 dB below target).
- you want sub-bass rumble that reaches down to 20 Hz.
- you are happy to use EQ: our preset lifts its Harman match by about 19 points.
Skip it if
- you want the best value: the higher-rated EPZ G10 costs about $275 less.
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 2.44 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 3 x dynamic drivers (10mm bio-diaphragm + 8mm titanium-plated + 6mm PU) |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 20kHz |
| Harman Preference Score | 67 (median of 7 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 18 ohms |
| Sensitivity | 103 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-1.5 dB at 30 Hz) |
| Tonal Tilt | -0.68 (negative is warmer, positive brighter) |
EQ Presets
Harman target
Set a preamp of -5.1 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 7 squig.link measurements, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 86 out of 100, up from 67.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +1.0 dB | 0.70 |
| High shelf | 10,000 Hz | -1.2 dB | 0.70 |
| Peak | 186 Hz | -3.1 dB | 0.79 |
| Peak | 660 Hz | +1.0 dB | 1.99 |
| Peak | 1,491 Hz | -1.7 dB | 2.85 |
| Peak | 3,031 Hz | +2.8 dB | 5.18 |
| Peak | 5,345 Hz | +4.1 dB | 0.65 |
| Peak | 7,006 Hz | -1.7 dB | 6.00 |
Neutral target
Set a preamp of -5.1 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 7 squig.link measurements, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 88 out of 100, up from 35.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -7.6 dB | 0.70 |
| High shelf | 10,000 Hz | -1.2 dB | 0.70 |
| Peak | 87 Hz | -0.9 dB | 2.17 |
| Peak | 186 Hz | -3.0 dB | 0.70 |
| Peak | 631 Hz | +1.1 dB | 1.70 |
| Peak | 1,498 Hz | -1.6 dB | 2.95 |
| Peak | 3,030 Hz | +2.8 dB | 5.14 |
| Peak | 5,345 Hz | +4.1 dB | 0.65 |
| Peak | 7,006 Hz | -1.7 dB | 6.00 |
Studio flat target
Set a preamp of -6.2 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 7 squig.link measurements, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 85 out of 100, up from 15.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -10.2 dB | 0.70 |
| High shelf | 10,000 Hz | +2.0 dB | 0.70 |
| Peak | 175 Hz | -4.9 dB | 0.74 |
| Peak | 698 Hz | +1.0 dB | 2.75 |
| Peak | 1,477 Hz | -1.5 dB | 2.97 |
| Peak | 2,556 Hz | +1.3 dB | 6.00 |
| Peak | 3,092 Hz | +6.0 dB | 1.49 |
| Peak | 4,335 Hz | -2.0 dB | 6.00 |
| Peak | 5,854 Hz | +4.7 dB | 6.00 |
Warm target
Set a preamp of -3.7 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 7 squig.link measurements, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 88 out of 100, up from 78.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +1.2 dB | 0.70 |
| High shelf | 10,000 Hz | -4.8 dB | 0.70 |
| Peak | 186 Hz | -2.9 dB | 0.86 |
| Peak | 1,564 Hz | -1.6 dB | 3.00 |
| Peak | 3,034 Hz | +2.5 dB | 5.96 |
| Peak | 5,532 Hz | +2.8 dB | 0.75 |
Bass target
Set a preamp of -5.2 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 7 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 87 out of 100, up from 68.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +4.8 dB | 0.70 |
| High shelf | 10,000 Hz | -1.2 dB | 0.70 |
| Peak | 186 Hz | -3.1 dB | 0.83 |
| Peak | 3,032 Hz | +2.8 dB | 5.19 |
| Peak | 5,345 Hz | +4.1 dB | 0.65 |
Bright target
Set a preamp of -6.7 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 7 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 78 out of 100, up from 22.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -7.6 dB | 0.70 |
| High shelf | 10,000 Hz | +1.9 dB | 0.70 |
| Peak | 87 Hz | -0.8 dB | 2.16 |
| Peak | 186 Hz | -3.0 dB | 0.65 |
| Peak | 620 Hz | +1.1 dB | 1.66 |
| Peak | 1,593 Hz | -1.9 dB | 2.29 |
| Peak | 3,573 Hz | +6.0 dB | 1.12 |
| Peak | 5,625 Hz | +3.8 dB | 5.45 |
V-shaped target
Set a preamp of -6.5 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 7 squig.link measurements, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 74 out of 100, up from 57.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +5.4 dB | 0.70 |
| High shelf | 10,000 Hz | +2.0 dB | 0.70 |
| Peak | 28 Hz | +0.7 dB | 1.01 |
| Peak | 95 Hz | -0.9 dB | 2.79 |
| Peak | 186 Hz | -1.7 dB | 1.03 |
| Peak | 580 Hz | +0.9 dB | 1.66 |
| Peak | 1,471 Hz | -2.2 dB | 1.75 |
| Peak | 3,354 Hz | +6.0 dB | 1.07 |
| Peak | 5,535 Hz | +4.0 dB | 4.47 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the Penon Serial measures across the audible range, against the Harman in-ear target that most listeners prefer in blind tests. Where the line sits above the target that range sounds louder (more bass, brighter treble), below it quieter. The curve is the median of 7 independent measurements, so one odd sample or rig cannot skew it, and both lines are shifted so their 500 Hz to 2 kHz average sits at 0 dB.
Measurement data: median of 7 measurements from the squig.link databases of dl, harpo, hbb, jaytiss, mmagtech, nymz and tgx78. Thanks to each of them for publishing their work.
Head-to-Head Comparisons
3 comparisonsNo comparisons match that search.