HD 660 S Reference
For the Sennheiser HD 660 S · Reference · AutoEq via OPRA
Neutral
Response curve10 bands · ±9 dB
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Measurement-derived reference tuning for the Sennheiser HD 660 S. 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 | +6.2 | — |
| Peak | 138 Hz | -2.3 | 0.58 |
| Peak | 4.8 kHz | +5.6 | 2.41 |
| Peak | 1.4 kHz | -1.3 | 1.30 |
| Peak | 44 Hz | +0.7 | 3.59 |
| High Shelf | 10 kHz | +0.2 | — |
| Peak | 3.2 kHz | -1.1 | 3.71 |
| Peak | 6.4 kHz | +1.4 | 4.98 |
| Peak | 4.5 kHz | +1.1 | 5.90 |
| Peak | 5.2 kHz | -1.3 | 6.00 |
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