Helix Compose FlexMount 100 CFMK100 MB.5 賓士用 4吋 中音轉接座

The twist-lock adaptor rings are genius—that single-turn motion seats the speaker perfectly and it’s rock solid in my Mercedes door. Took maybe ten minutes total, and the fit is so clean I almost forgot the original trim wasn’t made for it.

Saved my install—no drilling or cutting needed thanks to those pre-made adaptor rings. The 4-inch speakers locked in place with a satisfying click on the first try. Exactly what my door panels needed.

The twist-lock mounting system made installing my 4-inch speakers feel almost too easy, and the fit is absolutely perfect on my car's door panel.