Samson DB500 The passive dB500 has many of the same features as the dB500a, including the same rugged enclosure, and advanced drivers. A natural sounding fixed crossover is built-in, and the back panel features 1-4 inch and Speakon connectors. The dB500 speaker cabinet features an array of mounting options. Designed with floor monitoring in mind, they are also easily stacked or permanently installed. A 1 3-8 inch pole receptacle is built in, and 10 reinforced fly points are available.