Aperion Audio Super Tweeter Speakers Pair High Gloss Black Extended High Frequency Flat Ribbon Tweeter Six - Position Crossover Knob 6Position Treble Adjust Knob for Attenuation Frequency Response up to 30 k - Hz Five - Way Gold Plated Binding Posts Furniture Grade Gloss Piano Black Finish Curved Cabinet With Compound Angles Beautifully Completes Your Setup 5point Crossover OFFChoose between 8 10 12 14 or 16 k - Hz to set the Super Tweeter floor for the perfect blend with your speaker The OFF position renders the Super Tweeter inert The lowest setting 8 k - Hz will provide the most overlap with your existing tweeter while the highest setting 16 k - Hz will have minimal overlap picking up at the topend of the range Treble Adjust Knob - Too much of a good thing? Use the treble adjust to reduce the output of the Super Tweeter Just flip the switch and adjust to taste up to 5 d - B Easy Con