Woofer:
Speakers with working frequency response range from 150~500Hz are called woofers.
FAQ
Q1. What is the MOQ? Woofer Speaker,Home Theatre Woofer,Audio Woofer,Sound Woofer Shenzhen Xuanda Electronics Co., Ltd. , https://www.xdecspeaker.com
This was issued by the General Administration of Quality Supervision, Inspection and Quarantine and the National Certification and Accreditation Administration Committee in response to the ROHS Directive last month. The standard pays attention to the environmental protection requirements in the ROHS Directive to domestic electronics manufacturing companies.
The European Union has previously issued a mandatory standard ROHS (RestrictionOfHazardOus Substances) on toxic substances in electromechanical products, which will take effect on July 1 this year. ROH5 stipulates that electronic products should be free of cadmium, hexavalent chromium, lead-free, mercury-free, PBB-free (polybrominated biphenyl) and PBDE (polybrominated diphenyl ether).
After the entry into force of this regulation, all electromechanical products sold in the EU market must comply with these environmental standards.
The authenticity of this information has not been confirmed by the international electrical network, for your reference only. 
XDEC: 2000pcs for one model.
Q2. What is the delivery lead time?
XDEC: 15 days for normal orders, 10 days for urgent orders.
Q3. What are the payment methods?
XDEC: T/T, PayPal, Western Union, Money Gram.
Q4. Can you offer samples for testing?
XDEC: Yes, we offer free samples.
Q5. How soon can you send samples?
XDEC: We can send samples in 3-5 days.
6 environmental protection standards for mechanical and electrical products were officially implemented
From January 18th, six "standards for testing toxic and hazardous substances in electrical and electronic products" were officially implemented.