About right I would say - especially as not tested - the S45s look a little tired in the tweeter department.
Purely as an aside, I looked at the top plate of the BG3000 and noticed the small black plug just before the name. I have checked a picture of mine, long since given away, and it had the same. The only other deck with this that I remember was the Beogram 3400 in which the black plug could be removed and a small red LED inserted when the CD4 board was fitted. Why should the 3000 have a similar plug?