Line 6 Catalyst 100 Combo AmplifierThese powerful and sturdily constructed combos are equally suited for stage or studio use, and feature an XLR line output and a 4 channel USB recording interface. Also included are Boost circuits customized for each amp type, a dedicated Reverb section with six reverb types, 18 additional effects, an effects loop, a Power Amp input for using Catalyst as a powered speaker, MIDI capabilities, and power attenuation options for playing at any volume. The