Cixi Changhe Sanhe metal Enclosure Limited is one of the leading
 amplifier enclosure, waterproof amplifier enclosure, explosion-proof 
amplifier enclosure manufacturers and suppliers, if you are looking for 
company or China factory, please feel free to contact us.    
Amplifier is able to input voltage or power amplification device,
the enclosure is the important part of it.They are aluminum die casting 
enclosures.One type of them is explosion-proof. IP65.   
http://www.sanhe-enclosure.com