1) I've been getting a lot of replies from people who are evidently not understanding the simplicity of my question and in turn makes me wonder if they are actually using the Powercab in the manner that they think they are. I get the more complicated stuff. My question is 'simple': What are people/users (including Hindmarsh and Line 6 instructions) meaning by "normal", "amp in the room", and "air moving" - and why do they all have different settings? I thought the terms meant the same thing. Check out the following Line 6/Hindmarsh vid. If you skip to 2:24 he plainly explains the settings (flat mode and LF Raw) for achieving "traditional guitar speaker" behavior. Then skip to 2:54 and he plainly explains settings (speaker mode) to achieve "traditional amp in the room experience". What's the difference? I thought they were the same thing. 2) On the more technical side - I've been advised differently but I'm pretty sure if I'm using Flat mode/LFRaw (which I 'think' is my personal end goal), I still have to put a cab or IR in the Helix chain or it's going to sound horrible - same as before having the PC+ - right? . https://www.youtube.com/watch?v=K7yIZnYeXmQ