For the production of hi-fi speakers, the later sound debugging and correction is very important. Andhadhun's technical level and artistic accomplishment will affect the style of speakers. Signature means that the cabinet is adjusted by someone (mostly a famous speaker designer) personally, and the sound quality is more guaranteed than the standard version. In addition, there is a heavy material signature version, which is a speaker that improves the grade of components on the basis of the original design and is adjusted by the designer himself, and the effect will be better.