Well that was interesting! This is what I did to test the speakers: Amp settings 5W mode (master out), Master 5, Edge 8, Bass 7, Mids 10, Treble 7, Gain 6, Loop off I tried a Greenback G12C 1x12 16 ohms, the Creamback G12H 1x12 8 ohms, Greenback G12C 2x12 8 ohms and Greenback G12C 4x12 16 ohms. I us...