ER4S Reference
For the Etymotic ER4S · Reference · AutoEq via OPRA
Neutral
Response curve10 bands · ±9 dB
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Measurement-derived reference tuning for the Etymotic ER4S. Profile by AutoEQ, measured by crinacle, and distributed through OPRA under CC BY-SA 4.0.
AutoEq via OPRA
Reference source- Profile
- AutoEQ
- Measured by
- crinacle
- Target
- AutoEq default in-ear target
Converted to Spectra filter names; frequency, gain, and Q values are unchanged. The source preamp is replaced by Spectra automatic headroom after response verification.
Parametric bands10 active
| Type | Freq | Gain | Q |
|---|---|---|---|
| Low Shelf | 105 Hz | +6.0 | — |
| Peak | 2.6 kHz | -4.2 | 1.32 |
| Peak | 6.5 kHz | +5.2 | 1.03 |
| Peak | 1.5 kHz | -2.5 | 2.59 |
| Peak | 77 Hz | +1.3 | 2.26 |
| High Shelf | 10 kHz | -0.1 | — |
| Peak | 266 Hz | -0.7 | 1.03 |
| Peak | 872 Hz | +0.9 | 1.91 |
| Peak | 1.2 kHz | -0.7 | 4.31 |
| Peak | 112 Hz | +0.3 | 2.62 |
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