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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: PP power sourcePosted by Lx_ on: 7/25/2018
Interesting. It has always been my experience (as reported here already) that as outstanding the PurePower is at improving sound, it still is sensitive to input AC. This is contrary to what the product description would have you believe (the ProPower version is of course no different).
Romy stating that two PPs badly influence each other seems to support this claim, as does Bill saying that coating the cables leading to the PP quiets the system. If the PP was truly isolating our audio systems from mains this should not happen.
These days we are getting more and more of those switching power supplies. They are as great at being compact as being terrible for sound. So even with the PP doing its magic, I carefully track and disable as many supplies as I can (I am in the process of reorganizing the mains panel in my garage to be able to turn off all non-vital equipment easily using the circuit breakers -- individually or entire rows).
The only way to get truly spectacular sound from the PP was to run it from its internal batteries. But with those aging I have lost run time significantly (only a few minutes now). As it was only about 45 minutes when new anyway, I abandoned that route.
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