The combination of ambition and engineering excellence has always characterized Kenwood. Dozens of groundbreaking products came to market because of the company's unusual way of developing products, with the American side discovering what people wanted and the engineers in Japan designing and building it. Kenwood tries to pay attention to what people want, not just what is possible to build. This speaker features Subwoofer, 8" Woofer, built-in 100-watt amplifier, Ported Enclosure, Variable Defeatable Low-Pass Electronic Crossover, Volume Control and RCA Audio Input. Auto Power On/Off automatically turns the power on when a signal is received and automatically puts the speaker in standby if no signal is received for several minutes.