I read some comments regarding the volume control on the BHA-1. It is very strange as I'll try to explain.
When the volume is turned from 7 o'clock (minumum) to around 9 o'clock, the volume raise is significant. Turning the potentiometer to 12 o'clock doesn't bring that much of a difference. Turning the potentiometer to 15 o'clock doesn't make it much louder either. In essence, the level at 15 o'clock is approximately twice as lound as when the pot is at 9 o'clock. However, passing 15 o'clock increases the level literally exponentially and it becomes too loud very soon.
It is strange behavior. Is this normal?
Mine does this as well--
It allows for a finer tuning in the "sweetspot" range from 9 oclock to 1 or 2 oclock IMO and I actually prefer it. And if you don't like the finer tuning and want a lot of volume, you can do that too... just turn the potentiometer wide open (like you said, 15 oclock or more - not that I can listen that loudly).
I really like the way the potentiometer is used here