Hello.\n\nI plan to hook up some 4 ohm Emotiva speakers and I'm wondering if an X4500H can safely and properly push them at or near reference levels without the need for an external amp. Fortunately, they are fairly sensitive speakers, so I'm thinking I'll be fine, but I'm wondering if anyone has a similar setup and could offer their thoughts. This would be easier if I could find some impedance charts for the speakers, but they've been hard to come by.\n\nC2+ center, 92 dB sensitivity\nT2+ towers, 91 dB sensitivity\n\nI also have 2x Polk FXi A4 surrounds going through the AVR as well as 2x Hsu VT3-MK5 subs for LFE duties. The subs will be in the mix nearly all of the time, so they will take some strain off of the AVR.\n\nMLP is roughly 8' from the fronts. The room is in a finished basement (fully carpeted) and would be on the smaller side if not for an opening on one side. The ceiling is standard height and made up of mostly acoustical tiles. I've attached an old sketch for a (very) rough idea of what the area looks like. I'm trying to avoid constantly second guessing whether I should have shelled out for an external amp. If I did I'd likely have my sites set on a Monolith 3x200 - although even at that I'm not certain the nearby circuit would be happy with it as the circuit is under a 15amp breaker and it already powers one of the big subs as well as the AVR, TV, and all sources. Usage is 65% HT, 35% music. Most listening will be done at "reasonable" levels, however, there will be the occasional sessions where I will push things to near reference for the length of a movie or an album or two. Any insights would be appreciated. Thanks!