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The Q-230 is a dual   channel 30 band 1/3 octave graphic equalizer using constant Q filters to   maintain even bandwidth irrespective of gain ensuring transparent   adjustments even with extreme gain settings.
A fader range switchable from 6dB to 12dB helps you to get the best   possible sound from your rig in the situation you are faced with. A   sweepable 40Hz to 100Hz 12dB/octave HPF allows accurate removal of   unwanted low end rumble that can in turn increase overall system   headroom. The Q-230 is housed in a 2U 19” rackmount chassis and and has   inputs and outputs on XLR and 1/4” TRS balanced / unbalanced connectors.   Ground lift switches can eliminate any earth loop or hum issues. Power   is supplied via an IEC connector.