thanks for your reply.It helps a bit more... i'll seach for the comparaison between the rti and the m80.I dont need oversized speakers since i,m looking for quality sound.The use of the two receivers are for more watts... My sound is pleasing, and i've been tweeking and tunong(with an spl meter) my system, and it sounds awesome!! i only think that for 2 receivers, it's very powerfull, buti would like a little bit more.The fact that they are 4 ohm loudspeakers doesn't cause any problem.i also think that you are right, it's harder on the amp section, but my receivers can handle it.But thanks again for the infos, i'll go look for the posts on rti10 on this forum!!