Boss CH4220 4-Inch 2-Way Speakers ( Pair )

I installed these speakers 2 weeks ago in the dash of my car, hoping that I had found a quality speaker for a good price. The first time I listened to them, I thought I had, because they sounded great. A couple of days later, I noticed some vibration coming from the dash, as if the speakers were blown. I thought it might just be something loose in the dash, so I took the speakers out of the dash and listened to them while holding them in my hand. The speakers would vibrate any time there was bass being pumped through, and it is not worth it to send them back as shipping costs just as much as new speakers. So now I’m doing what I should have done in the first place: buying good quality speakers.