請教下megabass x-80

睇網頁見到megabass既x-80有分三種....

1 - http://www.megabass.co.jp/site/products/x-80sw/
2 - http://www.megabass.co.jp/site/products/x-80beat-sw/
3 - http://www.megabass.co.jp/site/products/x-80-plus1-sw/

其實三款野有乜唔同？有冇ching有相關經驗可以分享下？
萬個唔該 =]