這台採用分體電源/雙單聲道設計的No 52參考級前級，新系列大量運用了現在最頂級的音響技術集於一身，提供有頂級解碼處理能力，為配合網絡數位音樂潮流，也加入了USB 2.0輸入，配合內置的32bit/192kHz超級解碼輸出，方便數位多媒體音響用家使用。
SPECIFICATIONS
Description Reference Dual-Monaural Preamplifier Phono Inputs Input Overload (phono): >100mV @1kHz (40dB gain); >10mV @1kHz (60dB gain)
Communication and Control Volume Control Range: 80.0dB
Frequency Response Frequency Response (line-level): 10Hz – 40kHz (±0.2dB);
Frequency Response (phono): ±1dB (RIAA response)
Signal-to-Noise Ratio Residual Noise: <120dB (20Hz – 20kHz, input terminated,balanced) Total Harmonic Distortion (THD) <0.001% (balanced line-level); <0.02% (phono) Crosstalk <120dB (any input to any output, input unterminated); <140dB (any input to any output, input terminated)
Gain Gain (line-level stage): 0dB, +6dB, +12dB, or +18dB (user-selectable) -- Gain (phono stage): +40dB, +60dB @1kHz (user-selectable) -- Gain Resolution: 1.0dB increments up to 23.0dB on display (–57dB to –80dB); 0.1dB increments above 23.0dB on display (0dB to –57dB)
connectors Input Impedance Input Impedance (line-level): 100k ohms -- Input Impedance (phono): Resistive: 3.3Ω, 5.0Ω, 7.7Ω, 10Ω, 33Ω, 50Ω, 77Ω, 100Ω, 330Ω, 47kΩ,
Height 8.75" (22.2 cm) Width 17.25" (43.8 cm) Depth 13" (33 cm) Weight 60 lb (27 kg)