Why Do All Arcam Units (and Maybe Others) Have Only Two-Prong Power?
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jwseitz
Because Arcam spent the additional cost and used double insulated AC power wiring. Class II (with Roman numerals) refers to power supplies with either a double orhttps://www.heliosps.com/wp-content/uploads/sites/5/2017/09/application-notes-class2-insulation.pdf Class II Class II symbolhttps://en.wikipedia.org/wiki/Appliance_classes#Class_II EGC (Equipment Grounding Conductor) is not used or needed. . Grounding Myths "Electromagnetic Compatibility Engineering" by Henry Ott 3.1.7 Grounding Myths More myths exist relating to the field of grounding than any other area of electrical engineering. The more common of these are as follows: 1. The earth is a low-impedance path for ground current. False, the impedance of the earth is orders of magnitude greater than the impedance of a copper conductor. 2. The earth is an equipotential. False, this is clearly not true by the result of (1 above). 3. The impedance of a conductor is determined by its resistance. False, what happened to the concept of inductive reactance? 4. To operate with low noise, a circuit or system must be connected to an earth ground. False, because airplanes, satellites, cars and battery powered laptop computers all operate fine without a ground connection. As a matter of fact, an earth ground is more likely to be the cause of noise problem. More electronic system noise problems are resolved by removing (or isolating) a circuit from earth ground than by connecting it to earth ground. 5. To reduce noise, an electronic system should be connected to a separate “quiet ground” by using a separate, isolated ground rod. False, in addition to being untrue, this approach is dangerous and violates the requirements of the NEC (electrical code/rules). 6. An earth ground is unidirectional, with current only flowing into the ground. False, because current must flow in loops, any current that flows into the ground must also flow out of the ground somewhere else. 7. An isolated AC power receptacle is not grounded. False, the term “isolated” refers only to the method by which a receptacle is grounded, not if it is grounded. 8. A system designer can name ground conductors by the type of the current that they should carry (i.e., signal, power, lightning, digital, analog, quiet, noisy, etc.), and the electrons will comply and only flow in the appropriately designated conductors. Obviously false." Henry W. Ott Who is Henry Ott? http://www.hottconsultants.com/bio.html . |
Because it sounds better. A really easy test. Purchase a three prong to two prong cheater plug and isolate your amp. I actually use one for DAC also. Much tighter bass and a clearer background. There is a safety factor but your amp isn't a skill saw and to me the sound benefits outweighed the tiny risk of a shock. |
I could be struck by an asteroid too. Did you try a two prong plug into the new place? How did it sound? Look at your toaster. How many prongs does its plug have. A toaster would be a lot more dangerous to a user than modern amp.
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