Combine the MOSFET 50Wx4 power amp and EEQ Plus technology to get Direct Sub Drive, another unique Pioneer technology feature. It enables you to amplify your front speakers by 2 x 50 W and add a 70 W amplified filtered subwoofer (in 2 Ohm mode) in the rear to enjoy outstanding full power bass without an extra amplifier. It's an easy solution for lovers of booming bass.