Musical Fidelity M6S PRE Pre Amplifier (Black)The M6s PRE is effectively a preamp without limits. Its wide range of inputs, coupled with superlative performance, mean it can form the heart of almost any system, regardless of price. THD(+ noise) single ended: <0. 005% THD(+ noise) XLR Balanced: <0. 004% Signal to Noise Ratio: >96dB A weighted Frequency Response: +0, 1dB, 10Hz to 80 kHz 1x MM MC RCA Phono 2x XLR Balanced Line Level 4x RCA Phono Line Level USB type B connector for computer PDA