From Markbass, comes the EQS4 EQ bass module for the MoMark bass amplifier. The equalizer module features two channels, each possessing a 4-band EQ. The amazing little Markbass MoMark EQ module lets you customize and dial in two distinctly different EQ settings to select from, or combine the two for monstrous bass tone! The channel selector switch gives you the options of Channel 1, Channel 2, or both at the same time.