The Stax SR-X9000 ranks #91 out of 201 total Over-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: Stax
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#91 Stax SR-X9000: $6,819.99 Elusive Disc eBay
Pros: A preference score of 77, with the midrange from 200 Hz to 3 kHz staying within about 1.3 dB of target for natural, uncolored voices and instruments. Air above 10 kHz rises 1.7 dB, adding openness to the top end, and the neutral, slightly warm balance suits critical listening. It earns a higher rating than the Focal Utopia 2022.
Cons: It needs a dedicated electrostatic energizer, and bass falls 6 dB below target by 56 Hz, about 9.5 dB short across the sub-bass, so the deepest notes are faint. A 14.1 dB dip near 9.7 kHz dulls cymbals and detail. The Final Audio D8000 Pro Edition and Dan Clark Audio EXPANSE cost much less and rate higher.
| Released | 2021 (5 years ago) |
|---|---|
| Back | Open |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 2.72 dB standard deviation |
| Driver Type | Electrostatic |
| Drivers | 1 x large round push-pull electrostatic |
| Form Factor | Over-ear |
| Frequency Response | 5Hz - 42kHz (Manufacturer specified) |
| Harman Preference Score | 77 (measured by oratory1990, via AutoEQ) |
| Sensitivity | 100 dB |
| Sub-bass Extension | Falls 6 dB below target at 56 Hz (-9.0 dB at 30 Hz) |
| Tonal Tilt | +0.20 (negative is warmer, positive brighter) |
| Weight | 1 lbs (432 g) |
EQ preset to match the Harman 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 AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +5.7 dB | 0.70 |
| Peak | 1,081 Hz | -5.9 dB | 1.99 |
| Peak | 2,699 Hz | +2.5 dB | 1.47 |
| Peak | 201 Hz | -0.9 dB | 1.69 |
| Peak | 5,305 Hz | +2.1 dB | 6.00 |
| High shelf | 10,000 Hz | -4.2 dB | 0.70 |
| Peak | 7,973 Hz | +2.4 dB | 1.92 |
| Peak | 71 Hz | -1.7 dB | 3.73 |
| Peak | 6,342 Hz | -1.8 dB | 6.00 |
| Peak | 45 Hz | +1.0 dB | 4.46 |
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