The GlowPlug reproduces the saturation of the vacuum tube, and is a vacuum tube that gives a natural fat feel and warm feel like a vintage tube amplifier. By utilizing the "CROSSOVER" which sets the bandwidth for which the tube gain is applied, the MIX adjusts the blending between the classic tube sound to the rattling bone drive sound, you will get the tube sound you want without sacrificing the original attack or response. By setting it right in front of the DI, you can transform the tight sound unique to the line output into a sound with a thickness and driving sensation as if it is from an amplifier. In addition, when combined with the EDEN WTDI, it is a handy and high grade tube preamp DI system that can be used in a variety of locations, from recording to stage performance.