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About the BL1
The Audio Research BL-1 is a high-quality balanced line driver that provides balanced outputs from unbalanced inputs, improving noise immunity and signal integrity in audio systems. It features an input impedance of 1.5 megohms and an output impedance of 60 ohms at each XLR output. The unit delivers an output before clipping of 18V RMS balanced (with 9V RMS input) and 16V RMS into a 600 ohm balanced load. Noise is less than 18 microvolts RMS, IHF weighted, ensuring very low noise performance. It operates on 100-135 VAC 60Hz or 200-270 VAC 50/60 Hz power with a maximum consumption of 15 watts. The physical dimensions are 13 inches wide, 3 inches high, and 7 inches deep. The BL-1 is valued for its exceptional quality in converting unbalanced signals to balanced, often used to drive balanced power amplifiers from unbalanced sources, enhancing system performance and reducing interference.
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