Synergy Bogner Ecstasy, Pre-amp module for Synergy System, Designed by Reinhold Bogner, 2 Channels, The blue channel is based on the second channel of Bogner Ecstasy, The red channel adds additional gain, Three-position cathode selector switch allows the input tube bias setting to be configured for optimal input gain and bass response, Tubes: 2x 12AX7, Separate 3-band EQ's, gain and volume controls, Perfect for solos and metal