When driving, my left speaker occasionally cuts off. When this happens, and I go over a bump, it comes back on. Also, sometimes when my music is turned up, it will make a loud clicking noise. This is rare and when I turn it down it goes away. Do you think there is something wrong with the speaker or is it maybe loose connection with the amp. I checked the amp and the wires seem to be firmly in place. Any help would be appreciated. Thanks.