Check the listing for details. Eminence - APT-50 - Super Tweeter Horn Driver - 8 ohms. Condition: New. Listed at 69.95 USD. Brand NEW! The APT high-power super tweeter possesses extraordinary sensitivity thanks to a phenolic diaphragm, which has unique properties of stiffness and damping. By fluid cooling the voice coil, increased power handling and controlled low frequency behavior are assured.Key Features• Updated version -- no longer requires APT3 horn adapter for 1-3/8"-18 TPI mounting The APT high-power super tweeter possesses extraordinary sensitivity thanks to a phenolic diaphragm, which has unique properties of stiffness and damping. By fluid cooling the voice coil, increased power handling, controlled low frequency behavior and long-term reliability are assured. The APT super tweeter is available as a stand-alone unit to mount on your favorite 1-3/8"-18 TPI screw-thread horn, or pre-mounted on one of three Eminence horns. Specifications: • Power handling: 45 watts RMS (crossover frequency 3.5 kHz, 18 dB/octave), 85 watts RMS (crossover frequency 5 kHz, 18 dB/octave) • Impedance: 8 ohms • Useable range: 3,500-20,000 Hz • Fs: 2,500 Hz • Recommended crossover: 3,500 Hz • Sensitivity: 105 dB • Mfg. #APT-50 • Dimensions: Diameter: 2-3/4", depth: 2-1/2". - All international buyers are responsible for all tax, duties and/or customs fees.