The Aurum Cantus APR3.1 ribbon tweeter delivers the SPL and fidelity required to complement high-quality multiple woofer reference systems. Also pairs well with high-efficiency drivers. Controlled vertical dispersion and wide horizontal coverage, with sound quality characterized by superb transient response and low distortion. Hand-made aluminum foil planar hexangular honeycomb diaphragm. Wide horizontal and narrow vertical radiation angle, response past 30 kHz. Specifications: *Power handling: 50 watts RMS/75 watts max *Impedance: 6 ohms *Frequency range: 1,400-30,000 Hz *SPL: 95 dB 1W/1m *Recommended minimum crossover frequency: 2,300 Hz *Dimensions: A: 5-1/2" x 2-15/16", B: 4-5/8" x 2-1/16", C: 3-1/4".