Hello, this is my first post on this forum. Some days ago I buyed a second-hand A30a from Germany and I would share my experience. My English is poor, so please be patient...
Sonically speaking, my expectations on this little jewel are certainly satisfied: detail, naturalness, transients speed, bass control, low listening fatigue are its qualities. I prefer it to my actual dac Smsl D6s + self-assembled pair of Icepower 300as1 mono power amps.
However, there is one big drawback: the Sabaj would seem incompatible with my favorite speakers, a pair of Braun Ls120 which I upgraded replacing all the electrolythic caps with jantzen poly caps. Connecting this '90th german speakers to the A30a, It happens what the forum member Nahkarankaisija complained a few pages back: loud white noise constantly even on 0 volume and on every input (and the tweeter fuses burn). BUT in my case this happens only when connected to the Ls120's: with all of mine other speakers (Kef Ls50, Kef CS3, Grundig box 550) the Sabaj works fine! On the other hand,the Ls120's play loud and clear with all of my other power amps!
I just tried the firmware update and the reset procedure suggested by Roland68 (thanks).
I point out that the tweeters' polarity (as in the original crossover scheme) is inverted, but I think it doesn't matter. But it's also true that (sometimes, not every time) if I remove the Ls120 tweeter fuses, the A30a starts to play again.
After so many attempts I'm going crazy... any idea? Thank You.