Jensen DM2-2XX Iso-Max Stereo Line Output Isolator 1 to 1 Ratio XLR IN/Out-by-Jensen Features: Ruler flat frequency response preserves "Audiophile Quality" signals. High-Grade Nickel-Iron-Molybdenum alloy cores for extremely low distortion. High quality gold plated connectors for long term reliability. Available with a choice of XLR, RCA, 1/4" Phone Jack or BNC connectors. Unpluggable screw terminal strip for easy "Home" to "Road" changeovers.