I'm considering buying this head, but have some questions for all of you owning it. I couldn't really find straight answers by reading through the threads. When a dummy plug is in the effects loop, does it mutes all the outputs (both speaker outputs and the XLR) or just speaker outputs? Does the Level control has an affect on the XLR output or it's just a master volume control for the speaker outputs? Meaning, XLR out level is fixed with a pad switch for adjusting. I'm looking for a "warm, tube" sound, not really overdriven. So does it have the power when staying clean compared to all the rest of 500w class D offerings? I would very much appreciate if someone could help me with this questions. Thanks!