TANGHE factory locate in HANGZHOU China also have own brands of our own: TPJover the last decade speakers range has built a solid reputation worldwide for uncompromising reliability and performance, largely due to theskilled team who hand build eachand every speakers using only the highest specification componentsTo ensure this hard won reputation is maintained, every speakers is subjected to a strict test regime which includes a full function test using sophisticated test equipment, followed by a critical listening test recording test MP3 and USB test and for Rohs standard test.