how we produce the dual 21 inch subwoofer F221

F221 Dual 21 Inch Long Throw Dj Bass Speaker Subwoofer Long throw subwoofer cabinet box horn loaded design Powerful and punchy 21 inch neodymium woofer with 153mm voice coil High output capability Weather resistant painting Overview F221 bass subwoofer features two, powerful, 21”neodymium woofers with 153mm voice coils, the subwoofer speaker box offers serious amount of low frequencies. F221 is perfectly suited for various range of applications including concert touring, arenas, large houses of worship, large auditoriums, theaters and large dance clubs. Features Long throw subwoofer cabinet box horn loaded design Powerful and punchy 21 inch neodymium woofer with 153mm voice coil High output capability Weather resistant painting Thanks for watching, subscribe & share! #StefanSanwayaudio #poweramplifier #Speakers ► Subscribe to channel: Please give me your opinion. Where is not good Let me improve. ------------------------------------------ Thank you for watching the video. please support me. Thanks you very much. love everyone. If you need detail pictures and demo video of it. Pls send me a message on WhatsApp via this link: My Personal Facebook: Best wishes, Stefan Hu Sales Manager