My journey started out two weeks ago with a complete cover haul of my HTS. I started looking for a new sub last week. I posted a thread asking what subs people recommended. Well in a weird twist I was at my mother in laws house setting up her new Sony Theater in a box and while I was removing the "old system" that was to big and complicated for her (divorced, ex husbands stuff) I noticed the Huge sub sitting in the corner. It was my payment for setting the new system up. I took it home, plugged it up and damn does this thing play. I think i might have found my new sub. But I have no clue what model it is. The plate amp in the back has no serial number or model number. No brand markings. It is a elemental design woofer but that's all I know. It measures 18wX17hX21.5d Looked up the A2-300 but looks nothing like my subs back. Any help would be appreciated.