Or it could be there are two 400W amps built in to the speaker and you hook it up to a preamp. I think the specs would've stated 'recommended' amplification if they wanted you to supply the power.
What Does This Mean: Amplification: 2 x 400 watt per loudspeaker?
I'm still kind of new here but actively learning more. I'm trying to grasp why they would use two channels of amplification per each speaker. Is this bi-amplified? It's described as a Full-range in-room loudspeaker. It's Steinway & Sons new Model A. Just curious because I've never seen a speaker such as this.