Why do some manufacturers reverse preamp polarity in the first place?


My Rogue RP-5 reverses polarity, so I switch the pos / neg at speaker terminals. The manual does not mention this, however, I wrote the company and they the amp does reverse the polarity. 

Now my question is...why? I would say 98% of buyers of this amp do not know to reverse the cable connections. I would say most reviewers did not as well. Yes, I realize, polarity reversal is not noticable in most instances. Especially, since many recordings are all over the place when it comes to polarity (at least that is what I've read).

So the question remains...why...why not just have the amp terminals set up so the buyer can just plug in as normal?
aberyclark
Really? The Polarity pundit claims 92% of CDs are in Reverse Polarity. And he has a Polarity List to back it up. Furthermore the Polarity Pundit claims entire record labels are in Reverse Polarity. What evidence do you have? Who is right? I await your evidence. 
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Are you crazy? I’m just asking for evidence. I assume you’re just running your mouth. The Polarity Pundit has been studying Polarity for many years and has compiled a longish list. What have you done? Nothing. I never said I believe anyone. I’m asking people to support their claims with evidence. I’m not even demanding proof. Follow?
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