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Internal Power Supply Technology Changes since 1999?

I use an older very high end preamp with a separate power supply that is the same size as the preamp itself. .
The same manufacturer now makes better preamps,without the external power supply, that are about the same size as my preamp. What have been the technology changes that have simplified and presumably improved the power supplies?
ptss
gdnrbob
4,481 posts
 
Though I am not an expert, I think much has changed for the better since the turn of the century.
I own a lot of McCormack equipment, and can attest that Steve McCormack constantly updates his updates as newer/better parts become available-sometimes, he will be installing different parts than the month previous.
So, the point I am making is that, Yes, there have been technology changes since 1999. Whether they are worth upgrading to, is up to you.
ptss OP
1,964 posts
 
Thanks gdnrbob.I agree with you that technology is constantly evolving. I'm wondering about the specifics that have allowed the miniaturization of internal power supplies in very high end preamps.
gregm
3,411 posts
 
The major diff, I think is the advent of switching / digital PS that take up less circuit board real estate (and don't get hot, to boot). As to the smaller size, surface mounted technology allows the use of very small components and take up a lot less space than before (smd). Another thing that has changed is the price: top-fi, hi-end items are priced beyond our solar system nowadays!
SOUND wise, however...it all depends; the actual amplification circuits haven't really changed... So unless the components are tired and need a change (say, the electrolytic caps in the PS), you may not find significant improvements in the new equipment. To be fair to new stuff, hopwever, i find that newer speakers are much better than most vintage ones; likewise with digital players.
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