HD 820 Reference
For the Sennheiser HD 820 · Reference · AutoEq via OPRA
Neutral
Response curve10 bands · ±9 dB
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Measurement-derived reference tuning for the Sennheiser HD 820. Profile by AutoEQ, measured by Rtings, and distributed through OPRA under CC BY-SA 4.0.
AutoEq via OPRA
Reference source- Profile
- AutoEQ
- Measured by
- Rtings
- 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 | +3.5 | — |
| Peak | 937 Hz | -5.0 | 1.44 |
| Peak | 286 Hz | +9.6 | 1.67 |
| Peak | 175 Hz | -5.1 | 0.84 |
| Peak | 3.8 kHz | +6.0 | 3.26 |
| High Shelf | 10 kHz | +0.2 | — |
| Peak | 6.1 kHz | -5.3 | 5.26 |
| Peak | 4.3 kHz | +1.7 | 4.67 |
| Peak | 2.6 kHz | -1.4 | 5.09 |
| Peak | 1.8 kHz | +1.2 | 4.81 |
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