Use your guitar's volume control to adjust the amount of distortion you need, all the way down to very clean and clear with most drive settings. The Vertical Vexter Box of Rock has one Rock stomp switch. The Box of Rock also contains an extremely high-headroom, unity-to-50X gain booster with nominal input impedance and low hiss. Use the Box of Rock's boost channel alone or with the Rock channel to really crank this thing to 11. The boost channel follows the distortion channel which will allow your distortion to hit your amp harder when both boost and distortion are engaged for incredible solo boosting. The Vertical Vexter Box of Rock features 4 control knobs so you can find the exact tone you're looking for. The Drive control knob enables you to set the exact amount of distortion you want to add to your tone while the Volume control allows you to fine-tune the Distortron engine volume level. To make adjustments to your trebles all you have to do is just tweak the tone knob until you find your ideal sound. The Boost control provides you with complete control over the amount of boost you need, which is engaged with the left stomp switch. The Drive and Boost controls are based on ZVEX's original Super Hard-On gain control, so they may crackle when turned which is perfectly normal.