The Rotel RB-985 is a 5-channel amplifier that has an RMS of 500 watts, which results in capable handling of continuous power. Along with a low harmonic distortion of less than 0.03 percent, this Rotel amplifier has a frequency response ranging from 20 Hz to 20 kHz for creating an amazing sound quality. This 5-channel amplifier has a signal-to-noise ratio of 115 dB, ensuring a high-fidelity sound output. In addition, this Rotel amplifier has highly regulated power supply to ensure maximum power capability for high speaker loads. THX–certified, the Rotel RB-985 is compatible for use with all THX sound systems.