James,
Now I've auditioned the Model T's, I've positively established that the hiss is not to do with the 10bsub (I've taken it out of the system for the T's sake).
There's a hiss coming out of (both of) the T's tweeters. On both gain settings, a bit less in the 2v gain setting. (which is beyond me, how would a 2v gain be more silent than the 1v gain...?)
Mike suggested a noise floor check of the BP26. Would that still be your advice? And if so, who can do that, should i take the BP26 to Mafico? Or can i adjust anything myself in the BP26. Might of course also be something in the 28b's? I can not test that, since both have to be on to hear the hiss.
(or does a powered 28b, with an unpowered bp26 mean it isn't the 28b causing the hiss?)
Before i begin that journey, id like to hear from you and of course others on this board, if there should be a dead silent speaker, or if a hiss is to be expected. I wouldn't think so, especially in an all Bryston setup.
Would the update to the cubed input section be of any help here?
Cheers,
Marius