The white FB-150B AM from TOA is a 600 W, 8 ohms passive subwoofer designed to be used in conjunction with TOA's HX-7B or other full range speakers. It is effective to reproduce dynamic low-frequency sound in applications such as live stage, theater, houses of worship, and more. It features a 15" speaker with a frequency response of 40 to 400 Hz. The FB-150 cabinet is built of MDF material and is coated in urethane paint. The punched net grill is surface-treated steel.