THE PROTECTION LIGHT IS ON. I DONT KNOW WHY ITS ON. IF YOU HAVE ANY QUESTIONS.JUST ASK. The Yamaha MX-1000 Amplifier is a powerful 260W power amplifier designed for natural sound quality. With stereo L/R RCA audio inputs and banana speaker jacks, this amplifier is ideal for home audio systems. Its sleek black design and AB amplifier class ensure reliable performance for your audio needs. Whether you're looking to upgrade your current setup or enhance your home entertainment experience, the Yamaha MX-1000 Amplifier is a tested and working option that delivers impressive sound quality.