Brand: Dual
"Dual 1004" could refer to a stereo amplifier or speaker system that has two channels (left and right) each with a power rating of 100 watts per channel (4ohm). This would be a powerful and high-fidelity option for someone looking to install an audio system in a larger room or venue, as it can deliver clear and robust sound at high volumes. It may be a brand or model name, and further clarification would be needed to determine the specific product being referred to."