What subwoofer fits the RS12?

It is a single sealed enclosure sized for one 12-inch subwoofer. Check your sub's mounting depth and cutout diameter against the box before ordering.

Is a sealed box better than ported for my sub?

Sealed gives tighter, more accurate bass and a smaller box. Ported plays louder and lower but needs more space and is less forgiving of tuning errors.

Does it come with wiring or a terminal cup?

The enclosure is the product; the listing describes the box itself, not included terminals or wire. Plan on adding a terminal cup and speaker wire for the install.

Will the MDF hold up over time?

The 3/4-inch MDF, glued and stapled joints and silicone-sealed seams are built to stay rigid. Keeping it dry matters, since MDF swells if it gets wet.

Is it worth it over a cheaper import box?

If you want a rigid, well-sealed box that will not rob your sub of output, the thicker US MDF and extra sealing are the reasons to pick it over a thin import enclosure.