Speakers unloading?

[Based]

Recently this started happening... I turn it up and on low frequencies at high volume the subs sound like they're going crazy and the level of bass just fluxuates a ton. I don't know if this is the enclosure bouncing up and down due to vibration or the speakers unloading or what... Anyone have experience with this?

Click to read more...

 

[skdooley 10+ year member]

Its from a lack of support. Either too large of volume for the power the subs are seeing, too much port area, or playing too far below the tuning of the port. It could also be a combination of the three.