The Sony IER-M9 ranks #506 out of 668 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: Sony
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#506 Sony IER-M9 Discontinued eBay
Pros: Lower mids sit within about 0.5 dB of target, keeping voices and guitars natural. It uses 5 x balanced armature with an easy 20 ohm load.
Cons: Discontinued, so it is mainly found used. Presence sits about 4.1 dB low with a 7.1 dB dip near 6.0 kHz, so vocals and instruments lose some bite. A 7.2 dB peak near 11.2 kHz can make cymbals and sibilance sound sharp.
| Released | 2018 (8 years ago) |
|---|---|
| Connection | Wired |
| Deviation From Target | 2.55 dB standard deviation |
| Driver Type | Balanced armature |
| Drivers | 5 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 5Hz - 40kHz |
| Harman Preference Score | 66 (measured by oratory1990, via AutoEQ) |
| Impedance | 20 ohms |
| Sensitivity | 103 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.2 dB at 30 Hz) |
| Tonal Tilt | -0.59 (negative is warmer, positive brighter) |
| Weight | 0 lbs (11 g) |
EQ preset to match the Harman 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 AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +0.6 dB | 0.70 |
| Peak | 178 Hz | -3.6 dB | 0.60 |
| Peak | 5,993 Hz | +5.7 dB | 3.10 |
| Peak | 2,555 Hz | +4.0 dB | 3.01 |
| Peak | 791 Hz | +1.2 dB | 1.57 |
| High shelf | 10,000 Hz | -6.3 dB | 0.70 |
| Peak | 7,703 Hz | +1.4 dB | 1.76 |
| Peak | 3,487 Hz | -1.9 dB | 6.00 |
| Peak | 3,917 Hz | +1.3 dB | 5.98 |
| Peak | 1,862 Hz | +0.3 dB | 3.22 |
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