Eat your heart out spinal tap. Markbass must be Leo fender inspired. I just noticed, even without numbers, there are 12 levels. I have never had it higher than 2 and the pre on 6. Wow..what must it sound like on 12? Do the newer Markbasses go to 12? Has anybody tried cranking one of these?
All the way to the left would be 0 rather then 1 wouldn't it? So based on that photo and that thinking I see 10 lines with 10 being the max that's partially hidden.