JoeMeek meQ Meequalizer, 1-Channel Equalizer 500 Series Module, Frequency- and +/- 15 dB Switch for HF, HM, LM and LF, Bell-Button for HF and LF, Hi-Q Button for HM and LM, Peak-LED, Frequency Range: 1.2 kHz - 20 kHz HF, 0.6 kHz - 10 kHz HM, 120 Hz - 2 kHz LM, 40 Hz - 650 Hz LF.