2 - Dynaudio Excite X14A High-End Bookshelf Speaker (Walnut) An excellent handmade active loudspeaker driven by a perfectly-matched 50W power amplifier and based on the award-winning Excite X14 passive model The Excite 14A features three equalizer switches that allow fine-tuning the sonic performance even further, for example when placing the speaker near a wall, corner, or free-standing. The bass, midrange and treble can each be individually adjusted in three levels.