Before you mentioned about the modes on the K-01 googleli, I'd heard about them but never read or tried them out. After the post of yours about +6DB, I decided to try the 0DB and +6DB and to my ears the +6DB gives the SQ a little boost, sort of like a turbo. With Ians LL, his RCA interconnects were being used and my XLR's were used on my BHSE. At that time I don't know whether +6DB setting was on or 0DB but I never put the +6DB setting on because I didn't know about it until your post [ I've misplaced the K-01 manual ] . Because of that I've just tried the BHSE + K-01 with RCA's and XLR's on the +6DB setting and while I said that setting gives the SQ a boost, It's not like increasing the volume from 12 o'clock to say 2 o'clock. If a point needs to be proved, I think the best thing to do is for Ian to visit my place again along with his LL and try it out with both the RCA and XLR interconnects, and then do the same with my BHSE. But at the end of the day, doing this is not important to me because I'm immensely happy with the BHSE in every way.
P.S. From now on the +6DB setting when using my XLR interconnects will be used every time, so I'd like to thank you googleli for mentioning it.