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Koss Porta Pro

See usage instructions for more options and info.

Parametric EQs

In case of using parametric equalizer, apply preamp of -6.9dB and build filters manually with these parameters. The first 5 filters can be used independently. When using independent subset of filters, apply preamp of -6.9 dB.

Type Fc Q Gain
Peaking 22 Hz 0.88 7.0 dB
Peaking 142 Hz 0.37 -5.4 dB
Peaking 3599 Hz 3.67 5.3 dB
Peaking 7967 Hz 1.75 4.3 dB
Peaking 16571 Hz 0.38 6.4 dB
Peaking 1769 Hz 1.79 -2.9 dB
Peaking 2876 Hz 4.95 2.6 dB
Peaking 4149 Hz 5.57 1.8 dB
Peaking 5413 Hz 4.3 -6.5 dB
Peaking 6047 Hz 5.09 5.5 dB

Fixed Band EQs

In case of using fixed band (also called graphic) equalizer, apply preamp of -9.3dB (if available) and set gains manually with these parameters.

Type Fc Q Gain
Peaking 31 Hz 1.41 5.7 dB
Peaking 62 Hz 1.41 -3.1 dB
Peaking 125 Hz 1.41 -4.4 dB
Peaking 250 Hz 1.41 -4.1 dB
Peaking 500 Hz 1.41 -0.4 dB
Peaking 1000 Hz 1.41 -1.2 dB
Peaking 2000 Hz 1.41 -2.1 dB
Peaking 4000 Hz 1.41 3.7 dB
Peaking 8000 Hz 1.41 5.7 dB
Peaking 16000 Hz 1.41 8.8 dB

Graphs