Porta Pro Reference
For the Koss Porta Pro · Reference · AutoEq via OPRA
Neutral
Response curve10 bands · ±9 dB
Upvotes
0
Downloads
0
Bands
10
Measurement-derived reference tuning for the Koss Porta Pro. Profile by AutoEQ, measured by Innerfidelity, and distributed through OPRA under CC BY-SA 4.0.
AutoEq via OPRA
Reference source- Profile
- AutoEQ
- Measured by
- Innerfidelity
- 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 | +4.8 | — |
| Peak | 90 Hz | -7.6 | 0.41 |
| Peak | 7.7 kHz | +5.8 | 1.02 |
| Peak | 3.6 kHz | +4.0 | 2.61 |
| Peak | 34 Hz | +5.1 | 0.79 |
| High Shelf | 10 kHz | +0.8 | — |
| Peak | 1.9 kHz | -2.1 | 2.47 |
| Peak | 656 Hz | +1.2 | 1.77 |
| Peak | 238 Hz | -0.6 | 1.94 |
| Peak | 2.7 kHz | +1.3 | 3.99 |
Hear this preset on your Mac
Spectra is a system-wide EQ for macOS. Download it free and browse every preset.
Download Spectra freeApplying presets needs Base ($59) or Pro (from $11.99/mo). See pricing
Already have Spectra? Add this preset to Spectra