I think I've played through one 18" in my life, and I remember it being absolutely incredible. It was probably a mix of the stage, cab, amp and my bass, but the onstage sound was almost perfect. I can't remember the exact amp but i think it might have been an old solid state Marshall. Since then, i was looking for a cheap 18" cab until the past 5 years, until i got an old 15" combo. Kinda does the same job but i think i'd really like to experiment!