With 80 dB of quiet JFET gain and NoLoadTM input impedance above 10,000 Ω, it delivers the bandwidth and quietness needed for high resolution recording. The CurveShaperTM offers a natural option for sculpting your sound right at the start of the signal path. Switchable and tunable low frequency (LF) and high frequency (HF) contour controls allow engineers to tame proximity problems and provide HF extension and slope control. The high-frequency CurveShaperTM excels at adding a touch of air or presence, and the low-frequency control can remove boxiness and boominess in a fast and unobtrusive way. The Line/Mic switch bypasses the microphone gain stage and allows the EQ to be used for tracking with other preamps or during mixdown. Add the output level control, and the RPQ500 becomes a high-quality processing tool that can be used for mixing and mastering when combined with summing racks and mixerssuch as the Purple Audio Moiyn or the Roll Music Folcrom.