These devices, if fitted into an outlet without a ground, still do not provide the necessary ground wire and, while they give some measure of protection, won't solve any hum or buzzing problems you may experience. Contrary to some claims, using a GFCI (Ground Fault Circuit Interrupter) or RCBO (Residual-current Circuit Breaker with Overcurrent protection) is NOT an alternative. Yes, it's expensive, but it's worth every penny considering the alternative. There is only ONE safe way to use these outlets with grounded equipment'"you need to hire an electrician to rewire the outlets with a ground. If the wiring in your studio was installed before 1969, it's likely that you only have these 2 prong, ungrounded outlets. Please do not use these'"they are a potential hazard and, as they say, it's always fun until someone gets and eye poked out or, in this case, electrocuted. One of the most common causes of hum or other noise is improper grounding, including using ungrounded outlets for gear that requires a ground by way of a 3 prong to 2 prong '˜cheater' adapter.
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