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Question:

Does the plastic tube in your subwoofer box matter on the bass?

Does the bass get bigger or smaller when you have a bigger or smaller plastic tube that goes in your subwoofer box

Answer:

The larger the diameter of the tube, the lower the pitch. The longer the tube, the louder the volume at any given level of amplification.
Yes. The plastic tube is called a 'Port'. Its length and diameter are calculated to allow the speaker enclosure to breathe correctly. When music is playing, the speaker travels outwardly AND inwardly. When it moves it compresses air in the box. The compressed air actually restricts the movement of the speaker cone. This will affect the speakers response, especially at sub frequencies. So, the tube is designed to allow air to escape from the box thereby limiting air compression in the box. They are tuned to both the speaker and the box. If you remove the tube you can expect to hear undesirable speaker 'Waffling at high volume levels. Experiment for yourself. Remember, you may not notice much difference at low volume levels. Once you increase the volume and get the box really working, you will definitely notice a difference.

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