?Good material ? Made of high quality ABS plastic, this product is sturdy and durable..
?Fine processing ? The inner side is smooth and the bell ends are designed at both ends. The airflow is very smooth and the airflow is obviously improved..
?Size matching ? The height of the inverted tube is 90MM and the opening is 76MM. It is suitable for speakers with 4-8 inch speakers..
?Bass booster tube ? Speaker inverting holes, also called sound tubes and air holes, are often used in inverted speakers..
?Speaker Port Tubes? The sound pressure of the airflow vibrating in the box is poured out to overlap the sound pressure radiated in front of the speaker to produce a bass effect..
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