The GTM- 80.4D 4-channel digital amplifier, compact, full range, stable at 2 ohm stereo and 4 ohm in bridget, has a youthful look and unmatched power, perfect for connections in front and rear speaker systems, plus connection from a subwoofer, getting the boom you've wanted, enjoy an immersive stage, high fidelity, power and efficiency, it is designed to deliver clean power load, temperature control and low power consumption, excellent efficiency and low distortion.