Product Specifications: Natural distortion-free circuit concept in consistent format: 200 watts on 8 Ohm 350 watts on 4 Ohm Powerfully supplied by a fully stabilized network with: 2kW ring-core transformer Frequency Response: 20Hz - 20kHz Bandwidth: 2Hz - 180kHz S/N Ratio: 105db ~ 125db THD: 0.01% Damping Factor: 250 Inputs Balanced: Balanced XLR + Balanced XLR-CI (current injection) Inputs Unbalanced: Unbalanced RCA Input Impedance: 50k Ohm to ground 100k Ohm differential at XLR Input Impedance, (CI) Current Injection Input: 1.5k Ohm serial at XLR-CI Input Sensitivity: Max. 750mV RCA Max. 1.5V XLR Volume Adjustment: DIGM in 66 precise 1db increments Speaker Output: 1 stereo pair with gold plated binding posts Dimensions: 17.1 x 15.9 x 5.9 (WxDxH) Weight: 88 lbs. Content of Packing: - AMP S1 - Power Cord - Optical DIGM Waveguide - Owners Manual