Thank you for the recent comments of support, the 28b3 (s) are demo units and in black and my system is silver so unfortunately no photos.
I had too many other commitments so was unable to do a detailed session with them but...…
I do not wish to put down the 7b3 I had 18 months with them and enjoyed every moment but these beasts are different and for me " Low Level Listening " I am immersed in the music at low level volume where as the 7b3 were just playing music not singing to me. The 7b3 needed little more volume to get my PMC MB2se singing.
With the volume turned up say loud speech to very loud TV playing the 28b3 were still better by a long short, sound stage wider, strangely I thought lower noise floor, overall a very mature sound.
Bass better controlled and tight slightly more bass, more gravitas in mid range and more rounded treble. I could go on but will wait until the weekend when I can get a better listen.
The next question is to ask myself, " Is the extra spend worth it " ….?
If you have to think too long the answer is usually no.
Well pretty much made up my mind, I normally decide quickly, but will make a final decision over the weekend.... more to follow....