Oct 22, 2020 at 6:47 AM
Many thanks @zilch0md for your reply. I agree, quantification is not easy - but your view that an IT with 0.001pf is pretty good - will make it worth a shot! Thanks.Hi mkaza,
I wish I had an equation for calculating the maximum frequency at which NR is "effective" vs. the pF capacitance rating, but all I can say is that 0.001 is pretty good, compared to most new isolation transformers available today. Still, the smaller the pF, the higher the audio frequencies at which effective noise reduction is audible. I just don't have any data points to share.
Many thanks @oneguy for your reply. Yes, even my Audio Note dealer insists to remove the UPS but I am comfortable keeping it to address any power outages. My requirement is more towards noise filtration than surge protection currently. SurgeX components incidentally provide inherent EMI/RFI filtration (apart from surge protection) but your experience of IT proving more beneficial than SurgeX is an important data point for me.@mkaza
I’d think the best sound quality would come from the wall/IT/component combination but since you already have the UPS it won’t hurt to give it a shot.
I had a Surgex SA1810 prior to my Topaz/MGE units. They are good but don’t offer the same level of performance as my ITs. In the purely surge protector category, I’d highly recommend trying one though.
A dedicated circuit will provide less noise for an IT to attenuate but there still will be noise on a dedicated circuit due to upstream power components outside of your home. If you are in the US it’s possible to use other 120v wire that comes into your house as a quieter and cheaper source for a “dedicated circuit.” It’s not truly dedicated since it has 240v components on it but the number of devices on it is smaller.
One other q - my UPS is rated 3KVA - so, should the IT be also rated 3KVA or can I go with something smaller, say 2KVA considering my components' peak demand would be around 700W only?