Adopt Texas Instruments TDA7498E chip to get clear audio sound, No pop, no audible noise, dead silent when nothing is playing through it. 160W X 2(4 ohms, 20 Hz - 20 kHz, 0.04% THD), for outdoor/ bookshelf/ computer/ desktop /ceiling /floor standing speakers, can use iPod, Phone, MP3 players, TV, Echo Dot, CD players, or Streaming Media players as input. 2.0CH audio integrated amplifier, aluminum enclosed, small size, good looks, simple functionality, and excellent sound quality;