因為實在悲劇到不行
索性寫信給日本原廠問問看
未來有沒有機會透過韌體更新改善
回覆如下
Dear Mr. Gelion Lin,
Thank you for contacting Audio-Technica.
We are sorry for the inconvenience caused by "AT-WLA1".
There is no plan to release firmware to reduce background noise.
翻譯：這支就這樣了，在意的話，買別支吧

There is no plan XDD