... Sound Box, usb speaker,PA speaker, portable speaker,Speaker System, Active Speaker,Professional Speaker,bluetooth speaker,wireless speaker,vibration ... -woofer for lower frequency. This combination makes extraordinary sound quality. BassDuct TechnologyThe BassDuct is engineered to enhance ... enhance quality of Bass. Item NO: YM-JX959 sound boxMaterial: WoodenPower: 50W Speakers Unit: 3"Midrangex2PC+4 ...