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Koss Porta Pro

Koss Porta Pro

See usage instructions for more options and info.

Parametric EQs

You can use filters 1-5 or 1-10. Apply preamp of -7.2 dB or -8.0 dB, respectively.

# Type Fc (Hz) Q Gain (dB)
1 LowShelf 105 0.7 9.2
2 Peaking 83 0.47 -8.7
3 Peaking 3336 4.55 4.3
4 Peaking 6711 4.32 4.5
5 Peaking 8898 2.75 5.8
6 Peaking 658 1.45 0.6
7 Peaking 1892 2.53 -1.6
8 Peaking 2756 4.62 1.5
9 Peaking 4725 6 -3.8
10 HighShelf 10000 0.7 4.5

Fixed Band EQs

When using fixed band (also called graphic) equalizer, apply preamp of -9.6 dB (if available) and set gains manually with these parameters.

# Type Fc (Hz) Q Gain (dB)
1 Peaking 31 1.41 7.3
2 Peaking 62 1.41 -1.1
3 Peaking 125 1.41 -3.9
4 Peaking 250 1.41 -3.4
5 Peaking 500 1.41 -0
6 Peaking 1000 1.41 0.2
7 Peaking 2000 1.41 -0.6
8 Peaking 4000 1.41 0.8
9 Peaking 8000 1.41 4.9
10 Peaking 16000 1.41 9.4

Graphs