First off, I have to say I really appreciate this site, lots of great information!\n\nI am currently upgrading my current home theater and a couple weeks ago I purchased the Motion 40 towers and a Motion 30 Center Channel on closeout. I’m happy about the towers but, my Motion 30 center channel sounds dull\/muffled out of one of its speakers. The Motion 30 has (3) speakers. They consist of (2) 5.5” drivers and a Motion tweeter. The driver on the left sounds clear when I put my ear to it but the one on the right isn’t as loud and isn’t clear. It sounds dull \/muffled.\nCurrent system information:\n\nYamaha HTR-5250 receiver running 5.1 setup\nMotion 40 L\/R\nMotion 30 Center\nNS-A1638 (my old towers used as L\/R rear\nSW-4 Subwoofer (on the list to be replaced)\nNew wire to the fronts and center BJC 12 with spade Lugs\nNew Subwoofer Cable BJC LC-1\n\nHere is what I have done to problem solve for the Motion 30\n\nPlugged in old center (NS-AC143) with old wire to see if it had same issue. It did not, center sounded clearer than Motion 30\nUsing same old center wire connected the Motion 30. The right driver still sounded muffled, no change\nPut receiver into 2ch mode and disconnected one tower and hooked Motion 30 to that wire. Right driver still sounded muffled.\n\nThese speakers are new, and I have about 55-60 hours on them. Does this have anything to do with a break-in period?\nThe specs on the HTR-5250 look better than I expected when I looked them up. It looks like the receiver can drive (4) ohm speakers and has enough wattage. Thoughts on this? I do plan on purchasing a Denon AVR-x4500h or maybe even the x3600h just waiting to see what happens on Cyber Monday.\nI do plan to call support on this but wanted to reach out to the forum first. Any and all thoughts, suggestions are welcome!\n\nThanks in advance!