Hi Audiolabyrinth, yes I have 509x. I don't see that 509x has narrow/shallow soundstage. When played low to moderate sound levels, its actually very good, but pushed harder its (to me) sounds a little distorted. I think the pre-amp section in the 509x is great and this is why the 509x sound so refined and textured, but the amplifier section is a little underpowered. I come to realization, that unless I get high sensitivity speakers or small listening room, I shouldn't buy anything with power less than 250w /per 8 ohm and doubling it at 4 ohm. You need that kind of power to get that relaxed but powerful sound with great soundstage. I see you did it all correct- great cables, dedicated outlet. I don't think fuses will help so. To get the full potential out of your Magico q3, I think you need something like gryphon diablo, pass int-250 or vitus ri-101 or go with separates.
