The LM4780 is a stereo audio amplifier capable of delivering 60W per channel of continuous
average output power into an 8Ω load with less than 0.5% THD+N from 20Hz - 20kHz.
But in key specifications it is written:
*Output Power/Channel with 0.5% THD+N, 1kHz ; into 8Ω: 60 W (Typ)-----