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Koss Porta Pro

Koss Porta Pro

See usage instructions for more options and info.

Parametric EQs

In case of using parametric equalizer, apply preamp of -6.7dB and build filters manually with these parameters. The first 5 filters can be used independently. When using independent subset of filters, apply preamp of -6.7 dB.

Type Fc Q Gain
Peaking 25 Hz 1.06 7.0 dB
Peaking 128 Hz 0.53 -5.1 dB
Peaking 6712 Hz 4.79 3.2 dB
Peaking 9067 Hz 1.86 2.7 dB
Peaking 16371 Hz 0.3 4.8 dB
Peaking 648 Hz 1.79 0.7 dB
Peaking 1915 Hz 2.51 -1.8 dB
Peaking 3426 Hz 2.37 4.7 dB
Peaking 4684 Hz 3.42 -5.7 dB
Peaking 5892 Hz 2.29 1.0 dB

Fixed Band EQs

In case of using fixed band (also called graphic) equalizer, apply preamp of -7.5dB (if available) and set gains manually with these parameters.

Type Fc Q Gain
Peaking 31 Hz 1.41 6.9 dB
Peaking 62 Hz 1.41 -3.2 dB
Peaking 125 Hz 1.41 -4.1 dB
Peaking 250 Hz 1.41 -3.3 dB
Peaking 500 Hz 1.41 0.4 dB
Peaking 1000 Hz 1.41 -0.1 dB
Peaking 2000 Hz 1.41 -0.4 dB
Peaking 4000 Hz 1.41 0.7 dB
Peaking 8000 Hz 1.41 5.8 dB
Peaking 16000 Hz 1.41 6.9 dB

Graphs