Manley electro-optical Limiter, ALL-TUBE audio path, unbalanced 1/4" Inputs And Outputs, balanced Transformer Coupled XLR Inputs And Outputs, hi-current drive <50 ohm unbalanced outputs, silent conductive plastic INPUT attenuators, GAIN REDUCTION controls, BYPASS switches, large ILLUMINATED Sifam VU METERS, Meters switch to read OUTPUT or REDUCTION, STEREO LINK, Side-Chain High-Pass Filter 100Hz or 200Hz, <0.05% THD @1Khz, maximum gain: 15 dB, Power consumption (120/240VAC): 30 watts, dimensions: 19" x 3 1/2" x 10" (occupies 2u), shipping weight: 17 lbs.,