Monoprice 107495 2-Way 8-Ohm Active Wall Mount Speakers, Black (Pair) Self-powered speakers with built-in 30 watt/channel (25 watt/channel RMS) amplifier Signal to noise ratio of 95dB, with 75dB of channel separation 20 Hz to 20 KHz (+/- 0.5dB) frequency response range and a total harmonic distortion of 0.05% across the frequency spectrum Includes over temperature, over load, short circuit, and clipping protection circuits