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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.

Post Subject: To shunt or not to shunt.Posted by Romy the Cat on: 11/11/2011

I kind of thinking about it and I am not sure that I have an opinion. In the former PP2000 I stunted buttery with over 100K capacitors, presuming that it will driver DCR of buttery lower and therefore improve the day-to-day decoupling of PP2000 from power lines. It was not instant effect but it did not make anything worse and in a long run it did provide some day-to-day stability. There is no way to say anything certainly as there is no bypass switch. Anyhow, the PP3000 uses 8 batteries instead of 6 batteries of PP2000. This means that it has 2 extra series batteries that for sure raises input impedance of the entire battery pack. Still, the PP3000 sounds better than PP2000. What does it mean?
It might mean:

1) PP3000 used different batteries. Unlikely.
2) The batteries input impedance is irrelevant for decoupling. Unlikely
3) Something else in PP3000 makes the decoupling more effective. Possible.
4) Something else in PP3000 makes the coupling less relevant. Possible.
5) I make my listening during the day when else was not as effective as it might be. Possible.

This all bring back a question: would it be beneficial to add a large 125V cap across the PP3000 battery? For sure it shall not hurt but would it have any practical benefit? I will hold for now and will live with the unit observing how it react to power in the grid. I presume that it will be beneficial to shunt the battery with caps.

Rgs,
Romy the Cat

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