My subwoofer was working fine, then all of a sudden it is not working. all it is doing is making a thud noise every couple seconds, this is hooked up to the reciever, or not, either way it does this as long as the sub itself is powered on. it is an infinity subwoofer from the tss-450 series, it is 8 inch, and is a powered subwoofer with an internal amp. it doesnt sound like it is blown, and their is no distortion when it is making this noise, but it is not working at all other than this noise. i really like the sound on this sub, and do not want to buy a new one. i am really missing my bass when watching my movies, and would really like some help with this problem, please email me and let me know what would cause this, or what to do, thanks.

Audio Players & Recorders - Infinity - TSS-SUB4000 Subwoofer