The Microtubes® 500 is a 500W amplifier equipped with an all analog solid state preamplifier and a Class D Power Module.
On the top row, you will find the clean section which is the foundation of your tone. It features a Gain control and an active 4 band EQ: along with Low and Treble controls, you will find Low Mids and Hi Mids controls, each knob with their own 2-way frequency switch.
On the bottom row, you will find the Microtubes Engine®, an extra channel that will bring your clean tone to the next level by helping you cut through the mix while adding anything from subtle, tube-like, harmonics and natural compression to obliterating distortion.
More info here: