The Symphonium Zenith ranks #269 out of 1061 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: Symphonium
Prices on this page were last checked October 15, 2026 at 5:41 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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#269 Symphonium Zenith Bay Bloor Radio eBay
Pros: A four balanced armature flagship whose bass sits right on the Harman target, with full sub-bass to 20 Hz unusual for an all-BA IEM (score 76).
Cons: Treble sits about 3.6 dB below target, so it sounds relaxed and less detailed up top. It is expensive, sold mainly through Canadian dealers, and its score rests on three measurements. A 6.1 ohm impedance suits a low output impedance source.
Is the Symphonium Zenith right for you?
Buy it if
- you want the tuning most listeners prefer in blind tests out of the box (Harman score 76).
- your taste runs warm: it scores 88 for that sound.
- you are sensitive to bright or sharp treble (treble sits 3.6 dB below target).
- you want sub-bass rumble that reaches down to 20 Hz.
| Released | 2026 (this year) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 1.64 dB standard deviation |
| Driver Type | Balanced Armature |
| Drivers | 4 x balanced armature (TrueX 4-way crossover) |
| Form Factor | In-ear |
| Frequency Response | 10Hz - 20kHz |
| Harman Preference Score | 76 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 6.1 ohms |
| Sensitivity | 108 dB/Vrms |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.4 dB at 30 Hz) |
| Tonal Tilt | -0.53 (negative is warmer, positive brighter) |
EQ Presets
Harman 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 87 out of 100, up from 76.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +0.4 dB | 0.70 |
| High shelf | 10,000 Hz | -5.1 dB | 0.70 |
| Peak | 4,377 Hz | +5.2 dB | 1.03 |
Neutral 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 88 out of 100, up from 40.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -8.2 dB | 0.70 |
| High shelf | 10,000 Hz | -5.1 dB | 0.70 |
| Peak | 4,376 Hz | +5.2 dB | 1.03 |
Studio flat target
Set a preamp of -5.5 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 89 out of 100, up from 20.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -10.8 dB | 0.70 |
| High shelf | 10,000 Hz | +0.7 dB | 0.70 |
| Peak | 33 Hz | -0.8 dB | 3.17 |
| Peak | 182 Hz | -1.7 dB | 0.40 |
| Peak | 2,656 Hz | +2.3 dB | 4.18 |
| Peak | 3,893 Hz | +5.3 dB | 0.98 |
| Peak | 5,153 Hz | -2.6 dB | 6.00 |
Warm target
Set a preamp of -4.1 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 92 out of 100, up from 88.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +0.6 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 4,194 Hz | +4.2 dB | 1.97 |
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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 90 out of 100, up from 75.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +4.1 dB | 0.70 |
| High shelf | 10,000 Hz | -5.1 dB | 0.70 |
| Peak | 4,377 Hz | +5.2 dB | 1.03 |
Bright target
Set a preamp of -5.9 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 84 out of 100, up from 28.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -8.2 dB | 0.70 |
| High shelf | 10,000 Hz | -1.3 dB | 0.70 |
| Peak | 57 Hz | -0.8 dB | 0.82 |
| Peak | 1,315 Hz | -1.0 dB | 1.52 |
| Peak | 3,560 Hz | +1.7 dB | 2.42 |
| Peak | 5,345 Hz | +5.6 dB | 0.70 |
| Peak | 6,935 Hz | -3.1 dB | 5.77 |
V-shaped target
Set a preamp of -6.1 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 82 out of 100, up from 65.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +4.8 dB | 0.70 |
| Peak | 187 Hz | +1.3 dB | 0.82 |
| Peak | 1,242 Hz | -1.5 dB | 2.07 |
| Peak | 3,374 Hz | +2.0 dB | 2.44 |
| Peak | 5,345 Hz | +5.6 dB | 0.63 |
| Peak | 6,993 Hz | -3.6 dB | 5.51 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the Symphonium Zenith 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 3 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 3 measurements from the squig.link databases of aden, aftersound and precog. Thanks to each of them for publishing their work.