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In Reply to: RE: Has anyone made an audiophile grade cheater plug? posted by posbwp55@msn.com on June 30, 2007 at 15:32:14
I don't understand (economically) why you're using a $2700 power cord on a $1200 preamp. I too of course would connect my best power cord on hand to my pre and sources too...I seem to think one that can afford a $2700 power cord could afford a $10K preamp. Anyway, I challenge anyone here to tell us their horrific personal experience from lifting ground. "Theory" and "reality" don't always intersect. How on earth did we not burn down at least every other house in the 30's,40's,50's and 60's when no homes had 3 prong grounded AC. There are companies that sell nice powercords without a ground. I also understand why you wouldn't just want to take a pair of pliers to it and remove the ground pin. Good luck!
ET
Follow Ups:
I've got the scars to show what that causes.
The third wire (AC safety-earth, aka "ground") in the present USA domestic wiring scheme is there to keep a faulty appliance from killing someone. Appliance manufacturers have the choice of making their products with two or three power wires. A two-wire appliance is "double-insulated," which means there is adequate internal insulation to keep any conceivable internal fault from bringing the user into contact with the hot wire. A double-insulated appliance such as a hair dryer can still be lethal if dropped into a bathtub, which is why we also have ground-fault interrupters on AC outlets near plumbing fixtures required by code.
Unfortunately for audiophiles, most fancy gear is made with three-wire power cords. The ground loop is the circuit connecting amplifier audio ground to source audio ground through both the interconnect cable ground as well as the AC safety-earth wiring. Hum results if there is any voltage generated within the safety-earth wiring, as it appears in series with the audio signal as far as the amplifier is concerned. Lifting the AC safety-earth connection with a cheater plug breaks that side of the audio ground loop, and cures the hum problem. However, it removes the safety aspect of the equipment design.
How dangerous is this? It is difficult for users to evaluate their risk in defeating a safety measure that only functions rarely. How likely is a party guest or child to spill liquid into your equipment? How likely is your equipment to contain a design blunder, that causes equipment to fail after a long period of use? I've owned four solid-state amps in my life, and one had such a blunder, so my guess is 25%. What is yours?
Awe-d-o-file, this $1200 preamp has outperformed my previously used (CAT Ult MK2) $6000 preamp by a wide margin. Another audiophile recommended it. This $1200 preamp replaced his $14000 (VTL 7.5) preamp. That's why a
$2700 (Stealth Dream) is used on it. Alan could you give me more details
on your suggestion? What transformer should I use? How do I install it?
Give me the "transformer installation to eliminate ground hum for dummies" version. Thanks. BTW I installed my first Hammond 193L choke on the PLC (Hydra 8) as you and Bartc advised. I ordered 3 more so I can install one for each used outlet on the PLC. I read a lot of your posts regarding this and assume I am donig this right. Am I? Also another basic question on connecting the Hammond 193L to the AC plug. I know the longer lead is the hot and the shorter is the neutral. I read on another post that said the hot lead should be attached to the wider blade on the plug and the neutral to the other blade. Is this correct? Thanks.
Bart
The wider blade is the neutral side of the outlet...make sure the hot wires into the right side of the outlet / ac plug orientation.
Alan
also, if you like the Hammond Chokes you may want to contact Alan Maher and talk to him about the Power Enhancers. I have several in my system right now (with no chokes) and these things work quite well. I'll be removing my PLC shortly as Alan recommended to see what the PEs can do on their own.
Hi clio09,
I am using a Ming DA 2A3 preamp and it is very good. How do I contact Alan Maher and where did you buy the PE's? Have you tried the chokes?
I have too many new variables in my system right now to tell how they are individually affecting the sound. Once the pre breaks in and I get an idea of where I am I'll start adding more chokes and see how they sound.
Bart
You can just e-mail me at: audionutge@yahoo.com
Alan Maher
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