Some of those who insist on repeatedly trying to logically respond to that which is repeatedly nonsensical really need to stop and think about what they are doing.
It's like you're in the psych ward at the loony bin arguing with a crazy person in the hallway. At the same time telling every person that walks by about how crazy this person you're arguing with is (even though most are doctors, nurses, and other staff; already quite aware of the problem).
If you don't have anything of value to add that hasn't already been said why make every forum a psychological and/or language debate. Let's not forget the sideshow mentality.
Responding shouldn't take much more than say; Yes power supply requirements go up in accordance with sound quality/volume required. No the cords don't have much to do with this (though extremely cheap cords can be more likely to degenerate/malfunction). There are any number of things in an audio system that can have EQ and sound quality effects.
Questions with a high percentage of nonsense should be given a concise answer followed by a quick good day! Those who do insist on some pointed follow up questioning shouldn't act surprised when the answers logically return containing a high percentage of more nonsense. They also shouldn't be oblivious to how they just played a key part in networking more nonsense. Not so ironic that with nonsense you get increasing returns.
This isn't to say there are people that are 'beyond help', just that there is a time and place. Also, to address that this IS a skeptic forum after all, there are a number of topics in these forums I could have posted nearly this exact same post in yet won't (what does HD mean to you?). So, though they are a relative minority of all the topics in total, it is a bit telling that you can find most of them by the number of pages the topic contains (see last sentence, previous paragraph).
A good question for the forum would be: How would you respond differently to someone who is clinical than someone who is garnering attention (trying to make a buck or perhaps just trolling). Not to try and sway opinions, but I think you'd find the proper response to both being concise statements of fact with no expectations of being acknowledged logically (does then the source of the nonsense not become a moot point?). From that point on, unless the nonsense makes the unlikely turn into sense, only the propagation of the nonsense is at hand.