Okay, so I got bored and tired of my old bass tone. So I decided to upgrade both of my main basses to the 18V mod. Not too terribly difficult of a task. All it took was some light soldering and creative battery positioning. More to the point, the tone screams. There is an insane difference in everything here. Much less break-up coming out of the guitar, much cleaner silence, and very powerful low-end! Brutal!!!