hello, dear sir/madam it is happy to sent the email to you .the first appreciateme me to introduce myself , my name is I am from Teach-Audio, our company tech-Audio, founded in 1986, is a professional manufacturer for high quality speaker systems and amplifiers, which can also provide outstanding OEM & ODM service. We have more than1, 000 staff and produce over 50, 000pcs amplifiers and 600, 000pcs speakers monthly. Our main products include: Amplifier, Crossover, Wood cabinet in different finish (vinyl, veneer, piano paint, Nextel paint, etc.), Wood AV stand, TV speaker, Car speaker, In-Ceiling speaker, In-wall speaker, Outdoor speaker, Bookshelf, 5.1 system, etc. 90% of our products are exported to the United States, Canada and Europe market. By far, we have obtained the BSI ISO9001: 2000 certificate. For further info, please see our website