3. The inductor is wound with oxygen-free copper wire, the bass coil uses 1.2MM wire diameter, the mid-range coil uses 1.1MM wire diameter, the middle lower limit coil uses 1.0MM wire diameter, and the high-pitched coil uses 1.0MM wire diameter; The copper wire is full of power, making the bass more powerful. | 1. Circuit: The treble, midrange and bass are all designed with a second-order standard 12db/oct circuit. | 2. High-tone band current-limiting over-current protection bubble: When the current is small, the bubble acts as a wire; when the current is too , it acts as a load, consumes the current, and the high-pitched sound is not burned by the current too much. It belongs to a movable type protection. | 4. The capacitor uses a non-inductive MKP capacitor with a high withstand voltage of 400V, which better prevents the voltage from crossing and burning the speaker. The is reasonable, the appearance is exquisite, and the sound quality is .

The bracket can be rotated to quickly and adjust the direction of light filtering. Aluminium alloy, durable | Quickly switch ND filters without missing good picture | Compatible with most lenses | structure, no need to worry about quality damage caused by light leakage | Dimensions: 82MM