Fangrui Product Details Power: Single 400w; Triple Debugging: You Have Three Options Strong, Medium, Low; Bass Debugging: Set To Full Tone, Midrange, Bass, Or Powerful Bass Improved Version Of Plug: Mid And Bass For The General Frequency Of Two, If The Tweeter Sounds Low: You Can Set The Medium Change To Strong If You Have A Subwoofer, You Can Try Switching From Bass To Midrangeplug Medium And Low, Is For Standard High And Low Frequency Plug Low And Strong Bass , Is A High Low Frequency ; Plug Strong And Low, Is A Kind Of High Frequency Rich Plug Mid And Full Tone, It Is A Rich Mid Frequency The Crossover Is Suitable For A High Slant Midrange Two Bass Speaker Or A Bass Speaker. The Loudspeaker Is Suitable For Impedance Of 2-16 Ohms. The Design Is Based On The Massive 2-16 Ohm Value Design. Most Of The Products Are The Same To Improve The Sound Quality. Colour:red Green Material:metal Package Contents: 4 X Speaker Crossover Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different