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In Reply to: Jazz, you and he are talking about different polarities... posted by Allen Wright on December 29, 2004 at 02:26:04:
WE are not talking about the same thing. I am talking about matching the AC polarity to the unit. I know about phase reversal...i.e the 'qood effect" See Bound for Sound article for detailed information.
Bob Crump was a big help in telling me to reverse polarity and man was he right..no mods needed, the thiness some talk about is gone, pitch black background, zero noise.
Follow Ups:
This from another SCD-1 owner: I assume the only way to invert AC plug polarity is to add a cheater plug to the grounded three-prong plug. However, virtually all cheater plugs have one prong that's bigger than the other, and you cannot reverse it in the outlet.Am I nutz, or do I need to find an old-style cheater plug with two "skinny:" prongs?
Yes you can find an old cheater with two skinny prongs or file down a newer cheater plug, reverse it and listen for impact of bass, improved body and dymanics and much lower noise floor. This also can apply to preamps and amps, go to the bound for sound site and Martin wrote a detailed article on this subject.
Of course, this is impossible with molded plugs. You can also hack off the grounding pin and snip the wide blade to be smaller. I must say that I doubt whether the SCD-1 ground within the unit is attached to anything. If it is not a mega-buck pc, I would just hack off the ground pin and snip the large blade.There will be many who will tell you not to follow what they believe to be my unsafe advice.
Just make sure you unplug the other end first!
If you want to change the powerline polarity, you're going to need to either (a) replace the plug on the powercord with a non-polarized two-conductor plug (good luck in finding one!) or (b) take a standard "cheater plug" and file down the "fat" blade of the cheater plug so that it's the same width as the narrow blade. Then you will be able to insert the cheater plug into a polarized wall outlet either way that you want it.These days, all plugs, whether two or three conductor, are polarized. It is a safety issue with the way that some appliances are wired.
Thanks for the advice. I feel I may be lucky in one respect: I had the SCD-1 plugged into a power strip (accidentally left there) that I firmly believe inverts polarity; when I plugged the SCD-1 back directly into the wall outlet, the sound improved tremendously. This leads me to believe the polarity of the strip may be "correct" and the wall outlet may reverse polarity (assuming that's how the SCD-1 MUST be plugged in order to sound better).Anyway, the SCD-1 now sounds tremendous, used as follows: moved closer to the middle of the top shelf of my rack, so as to be more isolated from vibration; plugged directly into the wall outlet; and set to filter number "2" permanently. Highs are easy--non-digital--and feathery-delicate, sweet, and extended.
I can easily see how someone can feel the SCD-1 in its stock form is less than ideal, but I've found--as have others here, apparently--that if you pay attention to some of the "small" things, you can significantly improve performance to the point where the unit becomes really beautiful-sounding. I've been thrilled with it for more than a month now, and have been playing CD's nonstop (after abandoning them for LP's for a long time). I even placed a large (and expensive) order for xrcd's on the basis of the SCD-1's improved sound--that's how much confidence I have in what I accomplshed with it.
Power strips, reputedly, are notoriously bad things. You can get a polarity checker for a few $$$ at your local hardware store that will test power outlets, etc. and indicate whether polarity is reversed and also whether the safety ground is working.I don't have personal familiarity with the SCD-1, but I can report that the use of a balanced power supply made a very big difference in the performance of my CD player. Lots of other folks -- professional reviewers and individual audiophiles alike -- have reported the same thing with their CD players. Since the SCD-1 seems to be sensitive to power supply polarity, it might be that a balanced supply would have similar positive effects. Balanced power supplies 60VAC to each of the power-carrying conductors, but 180 degrees out of phase. The result is a potential difference of 120 volts between the two conductors.
Unfortunately, the damn things are expensive if you get one that will supply enough amps to run your entire system.
Agree on the use of balanced pwr supply. I was astounded by the improvement a BPT made on my 777ES.
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