Though incredibly heavy, I have personally witnessed these monsters vibrate themselves across a table and head for the floor if not caught mid-air, all the while vibrating the window blinds in the room down the hall. These subs originally came with springs for the original owner to set the sub on, to prevent such travel across the room. Includes additional (taller) rubber feet (3/4 adhesive). Fully Refurbished Sunfire True Subwoofer for sale original powered subwoofer for sale.Not: True Subwoofer Signature True Subwoofer Mark IV, True Subwoofer Architectural Signature, True Subwoofer Architectural TS-EQ12, True Subwoofer EQ 12 Signature TS-EQ10, True Subwoofer EQ 10 Signature TS-SJ8, True Sub Super Junior TS-EQS12, True Subwoofer EQ Solitaire 12 TS-EQS10, True Subwoofer EQ Solitaire 10, or MKII. The item "Sunfire True Subwoofer PROFESSIONALLY REFURBISHED By Flannery Vintage Audio" is in sale since Sunday, November 7, 2021. This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Home Speakers & Subwoofers". The seller is "mrbob84" and is located in San Lorenzo, California. This item can be shipped to United States, Canada, Bermuda.