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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 -7.3 dB or -8.0 dB, respectively.

# Type Fc (Hz) Q Gain (dB)
1 LowShelf 105 0.7 11.2
2 Peaking 69 0.47 -11.8
3 Peaking 3328 4.27 4.6
4 Peaking 6709 4.28 4.4
5 Peaking 8884 2.68 5.8
6 Peaking 223 1.7 -0.5
7 Peaking 607 1.02 0.8
8 Peaking 1800 2.64 -1.2
9 Peaking 4724 5.99 -3.7
10 HighShelf 10000 0.7 4.6

Fixed Band EQs

When using fixed band (also called graphic) equalizer, apply preamp of -11.1 dB (if available) and set gains manually with these parameters.

# Type Fc (Hz) Q Gain (dB)
1 Peaking 31 1.41 6.5
2 Peaking 62 1.41 -2.9
3 Peaking 125 1.41 -4
4 Peaking 250 1.41 -3.4
5 Peaking 500 1.41 0.1
6 Peaking 1000 1.41 0.3
7 Peaking 2000 1.41 -0.5
8 Peaking 4000 1.41 0.7
9 Peaking 8000 1.41 4.7
10 Peaking 16000 1.41 10.8

Graphs