Boompods Boombox, Blockblaster, black. Not your typical Bluetooth speaker, but a HiFi speaker. Other speakers usually have one type of driver. The Blockblaster features four professional drivers, with two covering the high frequencies and two handling the mid frequencies. Additionally, there are two Boompods membranes for passive bass included. Together, this creates an incredibly balanced high-fidelity sound with massive bass. Compact in design, this sound marvel can be taken anywhere.