Grampian Microphone
The Grampian mics are labeled GR ("Grampian Ribbon"), followed by a number and a letter. The GR1 designation was used for the semi-cardioid version, and the GR2 is the 'normal' figure-8 pattern. The letter shows the impedance of the mic, set by the output transformer winding. They come in Low, Medium, High.Our microphones are a 50K ohm version and is fitted with an unbalanced standard jack plug.
