The new C-900u was created for the pursuit of uppermost tone quality. The balanced amplification circuit has a 4-module configuration with independant right/left and hot/cold sound signals to surpress unneccessary noise generation. The latest version of 'Lecua 1000', Luxman's original fixed resistance switching type attenuator is used for the volume adjustment. The number of contacts is set to 88 to allow for more precise volume adjustment.Total harmonic distortion: unbalanced / 0.009% (20Hz-20kHz), balanced / 0.005% (20Hz-20kHz), Frequency response: 20Hz-20kHz (+0, -0.1dB), 5Hz120kHz (+0, -3.0dB), S/N ratio: unbalance / 123dB (IHF-A), balance / 125dB (IHF-A), Outside dimensions: 440 (W) × 130 (H) × 430 (D) mm, Weight: 19.7kg