The Eminent Ears RUBY ranks #809 out of 1253 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
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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#809 Eminent Ears RUBY: $2,300 Discontinued eBay
Pros: A broadly balanced tuning with a preference score of 68 against the Harman target.
Cons: An uneven response, 2.1 dB standard deviation from target. Discontinued.
Is the Eminent Ears RUBY right for you?
Buy it if
- 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 23 points.
Skip it if
- you want to buy it new: it is discontinued.
| Back | Closed |
|---|---|
| Connection | Wired (3.5mm / 4.4mm) |
| Deviation From Target | 2.10 dB standard deviation |
| Driver Type | Tribrid |
| Drivers | 2 Dynamic, 4 Balanced Armature, 4 Electrostatic |
| Form Factor | In-ear |
| Harman Preference Score | 68 (median of 5 squig.link measurements, calibrated to AutoEQ) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+2.8 dB at 30 Hz) |
| Tonal Tilt | -0.63 (negative is warmer, positive brighter) |
EQ Presets
Harman 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 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 91 out of 100, up from 68.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -2.3 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 164 Hz | -3.0 dB | 1.11 |
| Peak | 606 Hz | +2.3 dB | 2.05 |
| Peak | 1,510 Hz | -2.6 dB | 3.32 |
| Peak | 2,933 Hz | +3.7 dB | 2.45 |
| Peak | 4,856 Hz | +3.6 dB | 6.00 |
Neutral 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 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 93 out of 100, up from 28.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -10.8 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 134 Hz | -2.8 dB | 0.85 |
| Peak | 609 Hz | +2.3 dB | 2.11 |
| Peak | 1,510 Hz | -2.6 dB | 3.33 |
| Peak | 2,934 Hz | +3.7 dB | 2.44 |
| Peak | 4,856 Hz | +3.6 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 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 90 out of 100, up from 11.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -12.0 dB | 0.70 |
| High shelf | 10,000 Hz | -3.7 dB | 0.70 |
| Peak | 146 Hz | -5.0 dB | 0.81 |
| Peak | 626 Hz | +2.2 dB | 2.48 |
| Peak | 1,474 Hz | -2.4 dB | 3.88 |
| Peak | 2,381 Hz | +1.4 dB | 6.00 |
| Peak | 2,785 Hz | +6.0 dB | 2.64 |
| Peak | 4,756 Hz | +1.7 dB | 6.00 |
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 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 90 out of 100, up from 72.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -2.0 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 146 Hz | -2.8 dB | 1.13 |
| Peak | 614 Hz | +2.5 dB | 1.99 |
| Peak | 1,537 Hz | -2.8 dB | 3.55 |
| Peak | 2,795 Hz | +2.9 dB | 5.63 |
| Peak | 4,812 Hz | +1.8 dB | 6.00 |
| Peak | 8,000 Hz | -2.4 dB | 1.78 |
Bass 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 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 92 out of 100, up from 77.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +1.5 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 164 Hz | -3.0 dB | 1.16 |
| Peak | 609 Hz | +2.2 dB | 2.09 |
| Peak | 1,509 Hz | -2.6 dB | 3.31 |
| Peak | 2,933 Hz | +3.7 dB | 2.45 |
| Peak | 4,856 Hz | +3.6 dB | 6.00 |
Bright target
Set a preamp of -5.0 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 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 92 out of 100, up from 20.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -10.8 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 134 Hz | -2.9 dB | 0.83 |
| Peak | 602 Hz | +2.2 dB | 2.27 |
| Peak | 1,487 Hz | -2.9 dB | 3.61 |
| Peak | 2,723 Hz | +2.7 dB | 5.09 |
| Peak | 4,759 Hz | +5.1 dB | 0.99 |
V-shaped 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 5 squig.link measurements, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 90 out of 100, up from 74.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +2.2 dB | 0.70 |
| High shelf | 10,000 Hz | -4.8 dB | 0.70 |
| Peak | 142 Hz | -1.7 dB | 1.17 |
| Peak | 567 Hz | +2.3 dB | 2.38 |
| Peak | 1,429 Hz | -3.1 dB | 3.29 |
| Peak | 2,700 Hz | +2.9 dB | 4.96 |
| Peak | 4,598 Hz | +5.5 dB | 0.94 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the Eminent Ears RUBY 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 5 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 5 measurements from the squig.link databases of aden, eliseaudio, gadgetgenerations, jaytiss and joycesreview. Thanks to each of them for publishing their work.