Spider Valve MkII amplifiers are the result of a groundbreaking collaboration between Line 6 and Reinhold Bogner. Boutique-style amp designs combine with the most advanced Line 6 amp modeling to deliver muscular tube tone and unsurpassed sonic flexibility. The amp and effect modeling flows into the Bogner-designed 12AX7 preamp and 6L6 power amp, and the result is a guitar-playing experience unlike any other.