dynaudio bm6a classic

Cheers. I can see that Dynaudio's BM6A Classic has been on the market for nearly three decades (that's 30 years!). Hence, I am wondering how good it is? Or in other words: Does it live up to todays standard for a reference monitor? What characteristics does it have since it has been this long...

Cheers. How does the Dynaudio BM6A Classic behave when being close - i.e. 5-7 cm - to the rear wall, mounted on the original wall mount brackets? I know about the LF-switch, but does the sound suffer from sonic artifacts when the monitor is that close to the rear wall? Thanks in advance.