I just got a Type-x from a guy that claimed was barely used. Came with a ported box that he build that has good construction quality (it's not carpeted so I can see). I'm running it off my cadance amp at 2 ohms so its getting 1000w exactly. From the driver and passanger seat it sounds great(this is a scion tC with the sub and port pointed up at the hatchback), it will drop deep and and plays accurate through out all the ranges. But if I get close to the box there is mechanical noise. Is there mechanical noise usually associated with this sub? because I thought this one was known for its quietness?