Features:

21" High power handling subwoofer

 460 oz Y30H magnet 

Dual 1 Ohm impedance

5000W RMS Power

10000W MAX Power

• High roll 4-Layer foam surround
• Non-Pressed Pulp Paper  Cone
• Sextuplet 12" progressive roll Conex spiders
• Co-extruded dual tinsel wire system incorporating woven leads
• Black 3" anodized ultra-long aluminum hi-temp former for extreme power handling
• Dual 1/2 ohm CCAW (Copper Covered Aluminum Wire) flat wound voice coil
• Dual nickel plated 5-way 4 gauge binding posts
• Low carbon top and bottom plates yield symmetric magnetic field for increased operating efficiency
• 4-point precision motor alignment system
• Hyper extended one-piece vented back plate to maintain temperature stability and linear voice coil alignment
• Heavy duty machine cut die-cast aluminum competition style basket with CAD located aerovents

Some of customer want to do business with us . also want to visit us . following are some details about us :

Q:Where is your factory located? How can I visit there?A: Our factory is located in Jiashan county zhejiang province  about 1 and half hour from Shanghai pudong airport to our city . .All clients are warmly welcome to visit us!

3.Q:How can I get some car subwoofer samples?A: We are honored to offer you samples.the samples we can free charge ,but we need customers pay for freight fee . 

4.Q:How does your factory do regarding car subwoofer quality control?

A:Quality is priority. we always attach great importance to quality controlling from the very beginning to the very end.