Manger® sound transducer controls the complete frequency range from 80Hz to 35kHz on its surface and is at the same time close to the ideal of the point sound source. The conventional splitting into several ways (tweeter, mid-range and woofer) for different frequency ranges is therefore avoided. The active surface of the 19 cm diameter flexible diaphragm becomes smaller as the frequency increases so that the effective surface is always kept small in comparison to the wavelength to be radiated. Available in 4 or 8 Ohms and Oxide (84dB) or Neodymium (91dB) magnets.