American Bass Tweeter 200W Max 3-Way Mount Niobium Magnet Tweeter. Niobium Magnet. Polypropylene Diaphragm. Sensitivity: 102dB. Frequency Response: 5 kHz - 20 kHz. 4 Ohm Impedance. 200 watts max. Dimension: 6.5"Lx 5.5"Wx 1"H. Weight: 0.2 Lbs.