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
As long as you didn’t debunk anything yourself, I’m giving you a free pass. I always believe Wikipedia. 😛
^^ This is the same guy that was selling a CD duplicator called the RealityCheck, claiming he had upgraded the firmware somehow to justify a healthy markup. He was discredited as (although the duplicator did work well) turned out there were no mods to the duplicator other than said healthy  markup.

And this is the same person that made the amusing claims in my room at T.H.E. Show I posted about earlier. IMO we can put his claims to bed as inaccurate and move on. 50% of all CDs is a much more accurate number.  Keep in mind that our preamp was the first on the market to have an absolute polarity switch...