I recently bought two 12 inch subs and installed them. One of them is flexing a lot more than the other. They are underpowered but I dont know if that is causing one to flex more or if there is something wrong with the sub. Some advice would be greatly appreciated.
EDIT: I figured it out. One of the negative wires got disconnected from the amp.
Are they making any weird noise? Are the subs identical? Are the subs in identical enclosures? Are the subs dual voice coil? How do you have them wired? What amp are you using? How many channels, watts,... Aftermarket HU or factory radio?