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The Nordost QRT QBASE QB4 Mark III AC Distribution Unit combines elegant simplicity with sophisticated power conditioning in a compact four-outlet design. Its focused star ground topology and Primary Earth grounding architecture ensure superior sonic performance by maintaining the lowest possible AC supply impedance. The optimized multi-level PCB configuration strategically minimizes electromagnetic interference while maximizing current flow for uncompromised audio delivery. Without in-line filtering or active circuitry, this unit preserves signal purity while offering an external ground post for custom grounding applications. Includes dedicated fuse protection with two replacement fuses.