I sold my BM5A's, bought a Rotel power amp and ordered a pair of passive Dynaudio BM15's. Why passives? I have read lots of reports that the passives sound better than the active BM15A's if you have a high quality power amp. I will get the BM15's in 2 weeks.
There's nothing wrong with the BM5A's but I just want the bass extension which the BM15's can offer and I didn't want to add a subwoofer. The BM5A's play down to 50Hz. However, I tuned the ports a little lower with extensions and got the response to somewhere near 45Hz and the bass got alot better. However the BM15's go lower to 30Hz and the bass driver is larger which means lower distortion and more power.
Here's a review of BM15's, if somebody's interested:
http://recording.org/modules.php?nam...wcontent&id=30