And I reread them just before making my last post, as most were a quick read without substance.
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?
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?
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Of all the thousands of recordings I have had over the years, the only recording in my collection that called for reversing polarity (at the speakers), was a LP of Dave Grusin- Discovered again. Seffield Labs. I couldn't hear any difference in sound quality, at the time. That was many systems ago. Maybe I should re-visit that experiment and see if I hear any difference now. |
Well, Sheffield Labs recordings are actually on the Polarity List as R Reverse Polarity. +1 for George Louis. On a sour note, FIM recordings also appear on the Polarity List as R. A discussion of the Polarity List somewhere in cyberspace prompted this comment. I know everything I've done for FIM has correct polarity. Bruce A. Brown Puget Sound Studios Stereomojo reviewer Seattle, WA snapshot of Polarity List Reprise – Joni Mitchell – Blue N Rhino R River North Records N Rounder R SANSTONE MUSIC – MEL TORME – THE LONDON SESSIONS R Sheffield Labs R SHILOH RECORDS – Greg Harris – Acoustic II R SIRE – Talking Heads – Stop Making Sense R Solid Air R Solid Air Records – Grove Masters R Sony R Sony – Miles Davis – Kind of Blue R |
He does and presents no evidence whatsoever. He came into our room one time and insisted that our room was in reverse polarity. I flipped the polarity switch on our preamp. Then he insisted that you couldn't hear it on LP- only CD. So I played the same track on CD as I had it on hand. Then he insisted that you couldn't hear it if the source was analog...Thanks Ralph - priceless! |
percentage of CDs that are in Reverse Polarity is so highhttp://www.theaudioanalyst.com/cd_polarity.htm enjoy! |
^^ 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... |