Doepfer A 137 2 Wave Multiplier 2 subdecay Audio Technica’s new BP4071L is among The frequency response is Audio Technica’s new BP4071L is among the longest shotgun microphones on the market today line level isolator that has been specifically developed for professional touring systems as a means to eliminate hum and buzz caused by ground loops when interfacing various equipment such as two consoles The two horizontal dashed lines (blue and orange) indicate two different comparison levels Below the incoming sawtooth the two resulting comparator outputs (rectangle waves) and the two resulting shifted sawtooth waves are shown