yea, absolutely it is! Someone mentioned that EBMM does something similar too - I didn't see that on the USA Sub that I owned long enough to open up, but then I may have made a quick assumption when I saw a TRS plug and battery wires without thinking to myself, "hey, I wonder if they use some cool switch here based on the movement of the jack pin, rather than using electrical conductivity between two points in the trs jack?"... and that bass is gone now, so I'll never be able to tell. Unless I buy the local one on craigslist..... No Self, don't do it. Nope... don't do it self...Nope. I suspect that it’s just that Ian Waller was an electrical engineer and electronics geek and felt that separated power and signal circuits was more “proper” or clean or elegant, or something. It was a feature from their earliest active basses in the late 70s.
That switch is kinda a thing of beauty, isn’t it!
