Does the Qpower QBOMB include the subwoofer and amplifier?

Yes. Each enclosure ships with the 10-inch subwoofer mounted and a built-in amplifier, so you supply power, ground and an audio signal.

Sealed or ported: what bass should I expect?

Sealed boxes trade some deep-output volume for tighter, more accurate bass and a smaller box. Expect punchy low end rather than boomy, ported-style rumble.

Will two 10-inch boxes fit my trunk or truck cab?

Each box is about 16 inches wide, so measure your space before buying. Two boxes need roughly double the width plus clearance for wiring.

What do I need to install it?

You need a power wire with an inline fuse, a ground wire, a remote turn-on lead and RCA or speaker-level input from your head unit. Basic hand tools and a drill for mounting are enough.

Can I run just one of the two enclosures?

Yes. The pair can be split, so you can use one box now and add the second later, or run both for more output if your electrical system supports it.

Is it worth it over buying a sub, box and amp separately?

It is simpler and saves the box-building step, but separate components give more control over power, tuning and upgrades. Choose the QBOMB for convenience, components for flexibility.