KPH40 Reference
For the Koss KPH40 · Reference · AutoEq via OPRA
Neutral
Response curve10 bands · ±9 dB
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Measurement-derived reference tuning for the Koss KPH40. 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 over-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 | +7.3 | — |
| Peak | 80 Hz | -7.2 | 0.36 |
| Peak | 3.8 kHz | +4.9 | 3.90 |
| Peak | 574 Hz | +1.2 | 1.73 |
| Peak | 35 Hz | +3.7 | 1.15 |
| High Shelf | 10 kHz | +2.7 | — |
| Peak | 7.3 kHz | +4.0 | 1.02 |
| Peak | 5.4 kHz | -7.7 | 4.73 |
| Peak | 2.0 kHz | -1.9 | 2.22 |
| Peak | 2.9 kHz | +0.9 | 5.03 |
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