AMT SS-11B, 3-Channel tube preamp, Tubes: 2x 12AX7, Separate tone control for Clean and Overdrive channels, Gain adjustable Lead Boost, Well suited to NuMetal and modern heavy sounds, 2 Foot switches for Crunch/Lead & Clean/Drive, 2 Outputs: Amp Out and Cabinet Simulation Out, Powered with included 12 V power supply