[quote name='dave_bass5' timestamp='1464024195' post='3055851']
Yes i know, but my point is that when someone says amp A is louder than amp B, the standard response seems to be the knob position has no relevance. Without testing both amp how do these people know this? Why is it dismissed without any back up data?
[/quote]
The pots control the amount of tone and volume. Pots are all made to operate differently and different pots are used, so one will do 100% of it's work in the first 50% of it's travel. So an amp with this pot will be fully on with the volume controls at 12 o'clock. Looks like you've got another 50% to go and that can fool the player into thinking the amp is louder than it really is. Other pots will only be fully on at 100% of their travel.