They need a burn in few hundreds hours ,i Could made it first whith a denon 700ae amp,cuz i didnt had an receiver for them ,they had a lot of bas ,thats Why they Could distort them A-T high volum ,very compact that it seems like the box wouldnt be enough for it ,S-o Yes Kinda boomy ,although presents a contoured midrange ,refined highs that are sounding like a cinell,and whith this i Say it all ...and a pretty good stereo scene,,S-o i continued rodate them on a Nad356 ,they Shine now after more than 200h ,it is a delicios to listen them ,But i had it also the central c5 ,and now they make a good job on a Nad t747 receiver...although they're nominal 6ohms speakers ,i had measured them ,it shouwed somehow 4,and a half ohms minimal ,S-o i guess they are somehow hungry FOR power ...and to continue My honest rewiev ,the voices are somehow a Little Little bit laid back But they Excel whith instruments from the mid to low freq ...i nodest A-T somebody that a Arcam atack those speakers very good in dinamic punch and they dont mind ;-) !