Crate Bass systems come in a variety of flavors for every type of player. But, what makes them so special? Well, we test each unit in real-world gigs. (Would you believe the Crate Product Manager is a bass player?) From entry-level combos to higher-end designed units with pro features like contour circuits, XLR line out with level and optional JBL speakers, Crate's bass systems hold the bottom line every time. Crate Your Own Sound.