Berecha LZ-9000

Wow, another very rare Berecha. And check this out.....The disco lights are mounted in huge globes on the front of the speakers, while the actual loudspeakers are mounted on top instead! Very strange. I have never seen one of these in person. I'd be very interested to see how the lights operate. I have no idea what the knobs on the speakers do. Maybe they adjust the speed or brightness of the disco lights?