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Harmonix's Line Enacom M2 Filters
Misc. Accessories by Harmonix
ENACOM for interconnects IMPROVED
They're inexpensive, but they can make an astonishing difference to the sound you hear. The Line Cable Enacom is placed between your amplifier and your interconnects. The Speaker Enacom is connected across the binding posts of your speakers. And the AC Enacom just plugs into an
empty AC outlet near your system. Each of them will improve your system more than any other inexpensive upgrade possibly can.