SPL SMC 2489, Monitor Controller for Surround Sound and Stereo Productions, Input impedances, Symmetrical via Sub-D: 50 kΩ, Asymmetrical via RCA: 10 kΩ, Output impedance symmetrical via stereo jack: THD + N @ 0 dB input level: 0.01 %, Noise A-weighted: +98 dBu, Dynamic range: 120 dB, Frequency transmission bandwidth: 10 - 100,000 Hz, Dimensions (H x W x D): 91 x 272 x 220 mm, Weight: 1.80 kg