Installed in a bass reflex tube, this active sub-woofers is powerful enough to create the low frequencies that can’t be produced from an OEM solution. With a woofer, this sub-woofers is now even more powerful. Amplifiers are being assembled in small sizes. Sound quality operational amplifier NJM is set for analog circuit. Therefore, this models is able to reproduce a quality bass sound with built-in amplifier. The gain controller function enables to reach the favourite sound taste and quality easily. With the adoption of the high power class D amplifier, you can feel an amazing volume of bass sound. You can connect this tube subwoofer with various type of car stereos using speaker line connection or using RCA connection.