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There is a fairly new power modification tweak that has been very successfully implemented in source components. Basically, you need 2 .47uF 600V Auricaps (about $25). You put these across the + and - where the power enters the unit, in parallel. So one on top of the other, in effect.In the 4960 there are 2 X rated caps on either side of a small transformer. I replaced these caps with the 2 Auricaps, in effect doing the same thing as above, except that the small transformer is between the 2 caps. So the ...
OK, the unit has been burning in on both SACD and CD for about 3 days now. There may be a wee bit more that can be eeked out with time, but it should be 99% there.On Redbook CD's, comparing the unmodded 4960 to the modded 4960 (from memory): I can say that there is a definite improvement in a number of ways. The unmodded unit had good tonality, and that remains. It was slightly light sounding but has increased in body somewhat. For instance, before it would sound like a guitar or bass ha ...
The 0.47 uF cap presents a high impedance to anything low frequency, like 60 Hz. It only shunts high frequency to neutral (i.e. high frequency noise). I would recommend you pair them up as well. The filtering frequency is determined by the capacitance and if C is too low, then your filtering frequency goes up. That allows a whole bunch of lower frequency noise to go through.
Ray - the Auricap tweak has a long history of discussion over at Audio Asylum. Basically these caps do a good job of filtering out AC crud. Why 2 in parallel - dunno - something to do with the sum of the parts (.47 + .47 is damn close to 1uF) and both high and low frequency filtering against the the 60Hz AC cycles. I guess you could use less expensive caps, or even X rated ones like you see in most players. However, many people have tried the Auricaps successfully and reported clearly improved sonics. So I ...
Sorry Ray, I can't answer your question about the Auricap values. All I can point you to are the numerous discuissions about this tweak. There are others far more learned than I who might better be able to answer your questions. I suggest you do a search on the tweaks board at Audio Asylum, or even here at Audio Circle, and you will definitely find more information. If your answers aren't there, then you may want to post the question yourself. I know I'm interested in any additional information or improvements to this tweak that you may uncover.Enjoy,Bob