Thanks for the response. I wasn't planning on opening it up nor I ever will if a product is under warranty. I was just curious to see if any other members have had same symptoms as mine does and what remedy they sought besides contacting ML, of course.
A few days ago I bought an open box Depth i from Magnolia. I was in a hurry so I didn't have time to audition it to make sure everything worked. Well, it seems there is something wrong with the sub. It is hooked up to a Pioneer Elite SC-27. I am running a cable from the Pioneer's subwoofer...