BAT's VK-33 preamplifier incorporates changes to its power supply formerly reserved for Special Edition models. New SE power-supply transformers provide marked increases in dynamics and speed. In addition, the signal in the VK-33 is transmitted through only one gain stage. As such, it’s free from the negative artifacts attributable to both extremes of modern preamplifier designs: passive preamplifiers at one end of the spectrum and multistage, buffered active circuits at the other. The UnistageTM circuit provides the ultimate simplicity of amplifying the incoming signal only once, using no global feedback to double-back on the straight-through signal integrity.