The Clean channel runs through the preamp valve and has a separate Bright switch plus controls for Bass, Middle & Treble. Overdrive 1 sounds range from a vintage sounding Plexi all the way to the JCM800 crunch. Overdrive 2 goes from a hot-rodded JCM800 all the way to a JCM2000. Separate Gain & Volume controls are provided, plus scoop controls (OD1/OD2), Master Volume & Master Presence controls, Parallel FX loop, Emulated DI & Headphone output jacks and a heavy-duty 4-way LED footswitch. The ATV100 Combo features a custom designed Celestion 12" Extended Bass Response speaker.