Product Name: Dual 18 Inch High Power Stage Speaker Subwoofer (B2) Model NO.: B2 Application: Commercial Speaker Material: Wood Activity: Passive Hi-Fi: Hi-Fi Max Spl: 144 dB Trademark: VEMA Transport Package: Foam+Carton Packing Specification: 580*920*1107MM Origin: China HS Code: 8518210000 Product Description B2 powerful subwoofer speaker box1. Double 18inch subwoofer speaker box2. Using high quality 18mm thickness AA+ plywood3. Fashion appearance create poweful and full sound4. Back side open the wheels hole, you can install the wheels according to your real needs.5. Suitable for large performace,especially for matching up with the line array.