Product Review

2pcs 4 Inch DIY Bass Speaker Vibrating Membrane Passive Bass Woofer Diaphragm Plate
Working principle:
It will vibrating up and down when the speaker working, it will produce airflow, this air flow driven bass diaphragm,to produce low frequency.
How to use:
the speaker to open a subwoofer hole, the bass film installed, the entire box closed, airtight.
Bass vibrating membrane
Passive radiator
Full-range speakers bass enhancement
The hole diameter is 4.65MM
Package Including:
2pcs/pcak