2. analog
  3. 1322982838

Cambridge 640P Power Supply Upgrade

So I bought a Pangea P100 for my DACMagic (made it better)and figured, hey, one "wall wart" down, lets see if my 640P can use some improvement. So I ordered another Pangea (the name sounds like a holistic skin treatment, which I think there actually is). After a couple of days of use the Pangea PS seems to kick the 640P up to another level altogether...I now can highly recommend this cheap tweek. Interestingly (to me anyway), the stock 640P "wart" PS ran kinda warm and the P100 doesn't. I think that means something, doesn't it?
wolf_garcia
williewonka
3,075 posts
 
Wolf - Have you tried the PS audio cable on the amp or on a source?

I found my sources responded exceptionally well to good power cables, more noticeable than the one I tried on my sub.

How did the humbuster work out?

I tried one - it was no help in my case - I had to ground the case of a noisy source, but a nicely made unit all the same.

Cheers
wolf_garcia OP
6,708 posts
 
The cable on the Adcom is fixed and I'm too lazy put an IEC thing on it, and the "mystery" cable on the Jolida seems OK also (I did hook up the PS Audio cable to it just for the heck of it and it sounded the same so its cable seems OK). The Humbuster did what it is supposed to...the Adcom is dead quiet and the Jolida trans hum is really low...barely audible if you put your ear right next to it and that's great for a tube amp. I might put some premium AC cables on the rig someday, but since I'd have to re-wire the 515 (and spend some bucks) it seems silly, and the whole thing sounds great as is. Go figure.
daviddsailor
19 posts
 
I am using a 12VAC 10A transformer (from my junk box) in lieu of the 640P wall wart. It sounds better. I am also generating a nice clean 240VAC signal to power the transformer and my preamp by using a pure sine wave inverter running off a 12V 100AH car battery. Now I have a clean mains sine wave instead of the distorted wave from my houshold mains supply. It too is adding to my listening pleasure. Just remember to keep the battery charged. I have a theory that using this setup as much as anything, I am eliminating the mains earth connection especially in the preamp which feeds my monoblocks. Maybe not sharing the mains ground with the outers on my interconnects is making things generally cleaner, but that's just a theory of mine FWIW.
williewonka
3,075 posts
 
Daviddsailor - did you upgrade the power cords to and from the transformer?

I used kimber 4TC for the 12 volt side and furutech for the mains side - the difference was very noticeable - although I now have a braided romex power cable for the mains and it's almost as good as the furutech

The dc plugs can be purchased from ebay - very cheap
More to discover