M21 Super

About the M21 Super

The Stealth Audio M-21 Super is a high-performance AC power cord designed for demanding audiophile systems. It uses a very large multi-strand conductor structure with hundreds of individual wires, dozens of insulation layers, and multiple shields to maximize noise rejection and minimize interference. The overall diameter is over 1/2 inch, and the cable employs full-coverage shielding under a semi-transparent mesh outer jacket. Stealth's design emphasizes very low AC and ground resistance—typically 5 to 10 times lower than common AC cords—which can improve system dynamics and reduce noise. The M-21 Super is compatible with standard 15- or 20-amp wall outlets and IEC-equipped components, but Stealth recommends pairing it with their proprietary wall sockets for best performance. Pricing depends on length (e.g., a 1.2 m cable is priced higher than shorter versions), and terminations are available to suit typical high-end audio equipment.