YAMAHA EMX640 Powered Mixer 6-Channel Dual Amplifier Digital Effects EMX 640
Unfortunately, I don't have the knowledge to see if it works. It's sold as is, without testing. (There is power, but I don't have the necessary connections for testing.)
Yamaha Powered Mixer EMX640 – For Parts
Yamaha EMX640 for parts/repair Overall clean, powers up. Mixer portion seems functional (led output meter movement w/signal in). No speaker output. Amp doesn't show any signs of smoke. Someone has "visited" prior and did add rail fuses to back panel. Master output pot stem has been cheered (functional though, see pics) Case, corners, steap, and feet are all present and relatively clean with a lot of service life. Thanks for looking!