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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: Batteries vs batteriesPosted by Romy the Cat on: 1/25/2016
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 drdna wrote:
I beg to differ. It may contribute to the unique sound of the PurePower. I still have my old SA-3 amplifiers made by Nelson Pass. The massive capacitors take up 90% of the inside of the amplifier, and it does have an impact on the sound when taken to the extreme.
   
I am not sure that it is so.  In the Pass the caps do different things then in PP. The default PP has 460uF, I added I think 48K of ultra-low impedance caps. It shall improve filtration, theoretically. I did not detect sonic difference but it does not mean that the difference is not there when the electricity quality change. BTW, I did not do it with PP+ version and it still sound better then the older PP3000. Anyhow, I do feel that adding the caps “helps” but I personally do not attribute any sonic result to the fact of adding caps in parallel to batteries.    
 drdna wrote:
It is interesting to me to think about the use of Lithium batteries in the circuit. I have done many experiments with different metals for audio use, as they all have slightly different mechanical, electrical, and physical properties. Lead has a deep, placid but musical quality to its sound which can be quite seductive. I am not familiar at all with the sound that lithium may impart to the circuit, so it would be quite interesting to listen to this unit purely on that basis.
 I would very strongly discourage you to experiment with PP and different then the default batteries. The lithium batteries might have different charging demand that might screw up somehow the PP charging circuitry. I do not know how you but I very much NOT willing to have my PP broken. So, I stay as is. Regarding the sound and type of batteries. I do not think that it will have impact. In PP batteries is just a sores of juice and filtering devise. The regenerator and the post- regenerator   filtration is the items that “do sound” to much greater degree. I think your feelings about type of the batteries and Sound comes from the community of the folks who use batteries to bias tubes. Yes, in the battery on the grid case the type of the battery  create a huge difference.
 xandcg wrote:
For 30K I believe one can buy a big top of the range Eaton/APC online UPS, which output (teorically) <1% THD for linear load, maybe for the entire house, and still have money to deal with the low impedance and install another regenerator (audio grade). The house load is not linear but I am just making  a point.

  The amount of THD is irrelevant. You have no idea how that Eaton/APC will sound.

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