The Fosi Audio HT4S Bluetooth Amplifier is designed for outdoor speakers, providing powerful sound for a variety of audio setups. With a low distortion level of 0.03%, this amplifier delivers high-quality audio with a signal-to-noise ratio of ≥88dB. The HT4S features 4 channels, 6 outputs, and a frequency response of 20Hz-20kHz, making it ideal for sim racing and bass shaker setups. This sleek black amplifier from Fosi Audio is compatible with various types of cables and antennas, and comes with a 2-year manufacturer warranty for added peace of mind.