Here is a used sub woofer model PB-1000 It has an STA
-300D amplifier technology in it as labeled Unit is in good working order it has been moved around a little so it ain't cosmetically perfect but it was not abused. Look at the pictures please. the letter on the tape is just there to tell me which one to ship because I have 2 of them. This one has a small scuff crees on the surface back part it looks worse than what it is. I wouldn’t call it a damage but I have to say it’s not new and it ain’t perfect. Any questions let me know.