The answer to this question is not always straightforward. In general, an underpowered amp cannot blow a sub. However, there are some cases where it is possible for an underpowered amp to damage a subwoofer.
How does an underpowered amp damage a subwoofer?
When an amp is not powerful enough to drive a subwoofer, it can cause the subwoofer to distort. Distortion is an unwanted change in the shape of the audio signal. It can make the sound harsh or muddy. If the distortion is severe enough, it can damage the subwoofer’s voice coil.
How to avoid damaging a subwoofer with an underpowered amp
To avoid damaging a subwoofer with an underpowered amp, it is important to make sure that the amp is powerful enough to drive the subwoofer. The amp should be able to deliver at least as much power as the subwoofer can handle. You can also try to avoid playing very loud or distorted music on the subwoofer.
Can an overpowered amp damage a sub?
Yes, an overpowered amp can damage a subwoofer. When an amp is too powerful for a subwoofer, it can cause the subwoofer to overheat and damage the voice coil. It can also cause the subwoofer to distort, which can also damage the voice coil.
How to avoid damaging a subwoofer with an overpowered amp
To avoid damaging a subwoofer with an overpowered amp, it is important to make sure that the amp is not too powerful for the subwoofer. The amp should be able to deliver at least as much power as the subwoofer can handle, but not more. You can also try to avoid playing very loud or distorted music on the subwoofer.
An underpowered amp cannot blow a sub, but it can damage it. An overpowered amp can also damage a subwoofer. To avoid damaging a subwoofer, it is important to make sure that the amp is powerful enough to drive the subwoofer, but not too powerful.

