The Noble Audio Spartacus ranks #934 out of 1291 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: Noble Audio
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.
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#934 Noble Audio Spartacus: $1,799 Discontinued Bloom Audio $1,799 eBay
Pros: About 4 dB more bass than the Harman target below 150 Hz, for listeners who want a fuller low end.
Cons: An uneven response, 2.4 dB standard deviation from target. Discontinued.
Is the Noble Audio Spartacus right for you?
Buy it if
- you like extra bass (about +4 dB below 150 Hz versus the 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 26 points.
Skip it if
- you want to buy it new: it is discontinued.
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 2.41 dB standard deviation |
| Driver Type | Hybrid (Balanced Armature + Bone Conduction) |
| Drivers | 6 drivers per side (4 Sonion Balanced Armatures + 2 Sonion Bone Conduction Drivers) |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 20kHz |
| Harman Preference Score | 65 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Impedance | < 35 ohms |
| Sensitivity | 105 dB SPL/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+3.6 dB at 30 Hz) |
| Tonal Tilt | -0.98 (negative is warmer, positive brighter) |
| Weight | Not specified |
EQ Presets
Harman target
Set a preamp of -4.3 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: 92 out of 100, up from 65.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -3.8 dB | 0.70 |
| High shelf | 10,000 Hz | -0.5 dB | 0.70 |
| Peak | 198 Hz | -3.0 dB | 0.93 |
| Peak | 2,142 Hz | +1.3 dB | 5.39 |
| Peak | 3,244 Hz | +4.2 dB | 1.97 |
| Peak | 7,552 Hz | -4.2 dB | 6.00 |
Neutral target
Set a preamp of -4.3 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: 91 out of 100, up from 24.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -11.6 dB | 0.70 |
| High shelf | 10,000 Hz | -0.5 dB | 0.70 |
| Peak | 168 Hz | -2.8 dB | 0.61 |
| Peak | 2,139 Hz | +1.3 dB | 5.20 |
| Peak | 3,243 Hz | +4.2 dB | 1.96 |
| Peak | 7,552 Hz | -4.2 dB | 6.00 |
Studio flat target
Set a preamp of -6.3 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: 82 out of 100, up from 4.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -12.0 dB | 0.70 |
| High shelf | 10,000 Hz | +1.6 dB | 0.70 |
| Peak | 165 Hz | -5.1 dB | 0.63 |
| Peak | 2,135 Hz | +1.3 dB | 6.00 |
| Peak | 2,856 Hz | +6.0 dB | 1.95 |
| Peak | 3,602 Hz | +2.0 dB | 5.43 |
| Peak | 4,944 Hz | -1.6 dB | 6.00 |
| Peak | 7,541 Hz | -3.3 dB | 2.63 |
Warm target
Set a preamp of -2.8 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: 93 out of 100, up from 72.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -3.5 dB | 0.70 |
| High shelf | 10,000 Hz | -3.1 dB | 0.70 |
| Peak | 191 Hz | -2.8 dB | 1.00 |
| Peak | 2,219 Hz | +1.2 dB | 4.91 |
| Peak | 3,254 Hz | +2.9 dB | 3.00 |
| Peak | 4,914 Hz | -2.0 dB | 6.00 |
| Peak | 7,522 Hz | -6.0 dB | 4.06 |
Bass target
Set a preamp of -4.3 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: 92 out of 100, up from 78.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| High shelf | 10,000 Hz | -0.5 dB | 0.70 |
| Peak | 201 Hz | -3.0 dB | 0.97 |
| Peak | 2,143 Hz | +1.3 dB | 5.41 |
| Peak | 3,244 Hz | +4.2 dB | 1.97 |
| Peak | 7,552 Hz | -4.2 dB | 6.00 |
Bright target
Set a preamp of -5.4 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: 90 out of 100, up from 14.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -11.6 dB | 0.70 |
| High shelf | 10,000 Hz | +1.0 dB | 0.70 |
| Peak | 170 Hz | -2.8 dB | 0.56 |
| Peak | 1,285 Hz | -1.0 dB | 4.20 |
| Peak | 3,730 Hz | +5.3 dB | 1.15 |
| Peak | 5,932 Hz | +2.1 dB | 6.00 |
| Peak | 7,624 Hz | -1.4 dB | 5.61 |
V-shaped 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 V-shaped match with this EQ: 90 out of 100, up from 71.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +0.7 dB | 0.70 |
| High shelf | 10,000 Hz | +1.5 dB | 0.70 |
| Peak | 59 Hz | +0.9 dB | 2.05 |
| Peak | 171 Hz | -1.6 dB | 1.20 |
| Peak | 1,198 Hz | -1.5 dB | 2.54 |
| Peak | 3,769 Hz | +5.8 dB | 1.04 |
| Peak | 5,898 Hz | +2.0 dB | 6.00 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the Noble Audio Spartacus 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 dchpgall, harutohiroki and hbb. Thanks to each of them for publishing their work.