|Originally posted by Kevin C Brown|
reincarnate- You are wrong, as usual. Period.
Does ignorance have to be spiteful? Has anyone else noticed that AVS Forum used to have better technical discussions? Instead we now substitute arrogance.
Kevin you took the simple Equitech quote out of context: Again, the complete quote from Equitech:
Separate EMI/RFI filtering of incoming standard/unbalanced AC and outgoing/balanced AC".
The sentence discusses filtering of both
1) incoming and
2) outgoing power signals
RFI generators sources are both internal (other components) and external (from the AC line). Both require filtering. Got it?
Monster Power essentially states the same points as Equitech. From my Monster 7000 power conditioner manual:
"Distortion that typically runs right through other surge protectors is attenuated. It simply isn't enough to only filter the noise on the incoming power line. That is why your PowerSource also features revolutionary separate isolation for digital, analog, and computer. If any internally-generated noise from an electronic product plugged into an outlet gets through our Clean Power noise filters, it still has to run through yet another filter! The result is high quality tone and sound that is free from performance-damaging interference.
The important point (not stated in this thread) is that just using a transformer alone is not adequate enough, as my first post hinted at. The faraday shield helps to filter out frequencies up to about 100Khz but capacitive coupling between the primary and secondary windings allows RFI to pass largely unimpeded.
The balanced or isolation transformers in the Monster are triple shielded. Why? BTW, I find them to be just wonderful sonically. But I only use them for low power components.
Since Plitron transformers are under discussion, I will state my experience with them. I own their 2400 watt unit. It buzzes loudly. It causes the overall sound to darken and (especially the bass to) become softer. It even steps up the voltage to outside of the safe operating ranges. This causes my Monster 7000 to rightly generate an alarm. Needless to say the unit now sits in a corner upstairs unused. At least I only lost $350 thanks to the article from the experts at Secrets:
Coincidentally, now over a year later, the same author still complains of RFI induced symptoms:
"The sound has a smooth feel to it, rather than the sometimes edgy feel that 16/44 CDs have" in