This 'High Definition' bass head is completely based on Solid State technique. The HD heads have become favorites among studio session players, offering an exceptionally good and thought-out EQ that has been tuned-in carefully to cover all the frequency ranges that you need to optimize your tone. The basic layout of the control panel feature a Character filter, which is a quick fix to a modern type, mid-scooped overall tone. The input Gain control set the signal level into the amp from your instrument. The EQ section includes a shelving Bass filter followed by an advanced Middle filter where you pick the frequency range you’d like to adjust with the right control and cut or boost in that range with the left control, Treble and Bright. The Drive control helps to add some nice growl to the sound. On the back panel you'll find the Effects Loop, featuring a Mix level control that lets you blend in all effects hooked up through the loop with your sound. There is a Tuner output, for connecting a tuner rack unit easily. You have a Line out, in case you need the power from another amp to drive a second pair of cabinets, and finally the Filter Remote Inputs to connect the RM-4 footswitch that lets you switch on and off Character, Filter Bypass, Drive and Mute from front of stage.