Brand: Dual
The phrase "Dual 1001" may be referring to a specific product or technology. "Dual" is a brand name commonly associated with audio components such as amplifiers, DACs, and headphone amplifiers. If "Dual" is being used as a brand name, "1001" may be a model number for one of their products.However, if "Dual" is not being used as a brand name, it could potentially reference an obsolete computer operating system called "dualisen" that was used in Japan, which featured a 1001-based RISC CPU (processor).Without further context, it's difficult to determine the exact meaning of "Dual 1001." I would suggest providing additional information to clarify what "Dual 1001" is referring to in your original message or question.