I'm not very good at subjective reviews, so I'll try to be as meaningful as possible. Firstly, I'd like to say that I didn't buy the AVI ADM9Ts expecting them to be leaps and bounds ahead of the Dynaudio BM5As, in fact, I don't know at his level what would constitute a large step up anyway if we are to confine the comparisons to speakers with 6" drivers and similar cabinet sizes.
The ADMs look very nice and the finish and build quality seems very good, they are clearly very well put together. The gloss finish is preferable to me over the black ash of the Dyns and the addition of the grills is a must with small children around. Other big bonuses are the remote and the means to remove another box in the equipment stakes.
All in all, these benefits to me, are worth the price differential alone and it needs to be born in mind that my system was part second hand and part heavily discounted from new. Like for like, a new Dacmagic + and BM5A MkII setup would be almost on a par with the ADM9RS for price.
The two speakers are very similar in size.
Now for the sound.
I have listened to a range of music now, the latest tracks were
Ed Allyne-Johnson - Oxford Suite Pt III
Pendulum - Slam
Eagles - No More Walks In The Woods
Mazzy Star - Into Dust
It was immediately obvious that the presentation of the two pairs of speakers was different.
The Dyns are more forward in the top end and the bass, whilst very good, ie tight, there was a slight tendancy for booming, very noticeable on Adeles Rolling In The Deep when the bass line kicks in. This must be in part, due to the placement of the speakers, which are against a wall. I could not do much about this, so I had to live with the situation. In contrast, the ADMs do not appear to have any boom at all, with the bass being very tight and seemingly just as low as the Dyns, this was evident when listening to Pendulum - Slam. It was at this point that I very briefly considered the sub, not because the ADMs lack bass, because they don't, but because tracks such as this need sub bass that no 6" drivers will be able to put out and that job is best left to a sub. It is worth noting though, that it is a minority of music that is mixed with this much sub bass.
What also stood out was the midrange clarity and even-handedness of the presentation, the Eagles and Mazzy Star tracks highlighted this. These speakers do do vocals very well.
Regarding loudness, there's plenty of headroom, no question and I feel that they would be happy in a room twice the size of mine (3.5m x 6m, speakers firing across the width) and perhaps larger.
To summarise, these speakers represent a real terms upgrade to me for all of the reasons stated. I think that the ADMs are very even in their presentation, they have excellent clarity and well controlled bass, without hint of boom and value for money is superb.