The importance of sub-woofer performance in the whole sound system is obvious, and it is based on the importance of sub-woofer.The engineers of J.D has developed this series sub-woofer systems, which plays a pivotal role in the construction of the whole sound field, and then to open the sound field and enhance sound position, meanwhile It can show the content which can’t be expressed by full range speakers, finally It can meet the listening requirements of the audience greatly. Especially in some special areas: such as theaters,  If no sub-woofer ,It's hard to imagine what it looks like. This series of speakers is special for the places with high sound requirements:  KTV, Nightclubs, Meetings, Multi-functional Hall, Performance, Disco, and so on.

The series of speakers which takes large voice coil, high temperature design, then can withstand a great power shock, Finally It is classic speaker system.