These are open box OEM MTX 10” shallow subs. They used to sell something very similar to these for $170 each (FPR Series FPR10-04 10 inch 300W RMS 4Ω Shallow Mount Car Audio Subwoofer) with one main difference. These are .35 ohm. MTX used to sell a loaded “Stealthbox” style amplified enclosure. 3 of these in series for a 1 ohm load with a built in 1 ohm stable amp (can’t confirm this…. Until these never seen a .35 ohm sub, but don’t see a 3 10” enclosure anywhere. Only a single 10” amplified enclosure)

Visually very similar to the linked sub above which claims 300 watts rms and .6 cubic foot box recommended volume for each. Couldn’t get anyone at MTX to verify though. The back of the sub says 200 watts.

I’m selling 3 together for the low price of $100 plus shipping. I get a deal on shipping so it won’t be too much considering how much they weigh.