Correct - in my opinion there is no advantage to the BIT if you are using the 7B, 14B or 28B when it comes to instantaneous current draw. In fact having the Torus transformer internal to the amp works better when it comes to instantaneous current draw. There are customers that feel the Torus or BIT helps with 7B, 14 and 28B's so that may be a debatable point.
That being said the BIT still provides over load Protection and Noise filtering with all sources plugged into it.
Hope that makes it clearer.
james
I think not using the BIT on all other gear is a bit understated here. After having my 14B for awhile i entertained the notion of selling my Torus (Bryston BIT ...same thing). I figured why not, i got the instaneous power out of my 14B plugged right into the wall...... Yahoo !!!!!. That notion was mostly reinforced by my experiences with the 4B and how it turned that amp into monster little power house.
I tell you what, i had all my gear unplugged from the Torus (using the 14B) and everything into the wall. Even with the 14B and its latest transformer the whole system suffered. I lost a lot of the attack and dynamic sensations. It sounded somewhat fatigued (having recently used my Torus). It wasn't good and definitely a step back.
The Torus makes you think you have active speakers. The sense of powering you soundstage that actives give you less the commitment to one power and more ability to mix and match amp/speakers that you can't do with actives. This is with the Torus on all gear only !!!! Not just the amp.
I am coming from a 240v and not entirely sure about the 120v version.