Similar to パラメトリック・スピーカー

Elac

Loudspeaker enclosure

Subwoofer

Genelec

Active noise control

Super tweeter

Skullcandy

Mid-range speaker

Danish Audiophile Loudspeaker Industries

Tannoy

Tweeter

Dynaudio

Devialet

Battery terminal

Bass reflex

Focal-JMLab

Bookshelf speaker