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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: Silent like fish...Posted by Romy the Cat on: 6/14/2014
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 drdna wrote:

While it is true that changes are constantly being made probably from unit to unit in production at APS, the major design change occurred with the adoption of Class D circuitry in the PP Plus series.
I suspect that the problems are caused by a mechanical/structural issue of the electrical circuit that is prone to failure in assembly or by damage in shipment. Maybe it would be best to just fly to their factory and pick one up in person.

 
Actually I do not believe in any damage in shipment. Not for the problem people report. Also, there was no “Class D circuitry in the PP Plus series”. The Class D circuitry was used from beginning of time in those regenerators. Sine you say that the unit worked fine for you from battery and developed problem only when It was running from the wall them most likely that if any problem did exist in there then it was in battery charging circuitry – in my view the weakest point in the whole unit. I do not think that it was “failure in assembly”. Most likely it was that in PP+ units they moved to 96V batteries and they redesigned the charging circuitry and that “redesign” had some faults. Still, I have my badly “redesigned” PP+ and they are silent like fish. So, following the simplest explanation I do blame the end users.
 

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