Is the Rock Shaker 15 good for movies or music?

It is tuned for low-frequency reinforcement, so movie soundtracks and effects are its strength. Music is fine too, but the crossover and phase controls matter more for blending with main speakers.

What amplifier power do I need to drive it?

None. It has a built-in Class D amplifier rated at 500W RMS, so you only need a receiver or processor with a subwoofer output or speaker-level outputs.

How do I connect it to my receiver?

Use a single RCA cable from the receiver's sub-out to the Tiffany-style RCA line input, or run speaker wires into the high-level inputs if your receiver lacks a sub-out. The line output lets you daisy-chain a second sub.

What do the rear controls do?

Volume sets output level, crossover sets the upper cutoff up to 200 Hz, and phase switches between 0 and 180 degrees to help blend with your main speakers. Set the receiver's crossover first, then adjust.

Does it come with a cable?

It includes an IEC power cable. You supply the RCA or speaker cable for the audio connection.

How big is it and where should it go?

It measures 18.5 x 15.75 x 22.05 inches and weighs 46 lb, so plan a floor spot near an outlet. Corner placement boosts output; pulling it out from the wall can tighten the bass.