The 10 that thinks it's a 12. This speaker was developed to recapture the legendary sound of Celestion's 1970s 10s - a 10 speaker with a surprisingly meaty tone. Low in output but with the weighty low-end balance of a 12, the G10 Greenback features a complex, creamy mid-range and smooth, vintage top-end. In small combos this speaker adds real class, and when combined in a 4x10 gives rise to a raunchy, full-bodied tone, rich in low-end thump.