This compact 4" (127 mm) full-range speaker is equipped with a high-compliance, damped cone that provides excellent low-frequency reproduction and a smooth extended response. The FC104 also offers a wide dispersion angle that reduces the number of speakers required to achieve full coverage in low-level distribution systems. The 10-watt, 8-ohm (transformerless) model offers a frequency response range of 150 Hz - 17 kHz, a sensitivity of 94 dB (at 1 watt, 1 meter), and a dispersion angle of 135° (-6 dB, 2 kHz octave band). The unit contains a 10 oz (283 g) ceramic magnet with a flux density of 10,500 gauss.