[rbrb]

There is a company that sells higher output power supplies for NAD phono preamps.  For example the PP1 comes with a 15 volt/100ma power supply.  They sell a 15 volt/600ma version as a upgrade.

For the PP2 they supply it with a 24 volt/400ma version instead of the stock 100ma version.  as a further upgrade they have a 1000ma version.

I don't have a real understanding of electronics but I question whether this is safe.  I was thinking of ordering the 600ma version for my NAD PP1 but I'm also interested in upgrading my Project Phono Box SE.  It comes with a 16volt/500ma stock, I'd like to get a 16volt/1000ma version.

The fellow that sells them for the NAD units claims the higher output units improve the whole audio spectrum, wider and deeper soundstage, more powerfull bass, better dynamics and timbre.

Can someone tell me what is happening here.  Will increasing the ma output harm the preamp in anyway?

[Uptown Audio]

Of course the guy selling them claims that, but the truth is that a phono preamp draws very little current and so the stock power supplies are probably adequate for top performance. The additional current availability will not hurt the units in and of itself. The current delivery is determined by the amplifier and having more available is good as long as it will be used. If the stock supply has enough or more than enough available, then no matter how much larger the supply, there will be no more current delivery. If for some reason the amplifier did want to see more current (you shorted the inputs or outputs maybe) then the larger supply could cook the amplifier if it id not have fuse protection. There would be no reason for fuse protection with a cheap unit like that assuming the stock supply was used and had some thermal protection in itself so they are probably not fused.
I would skip the whole idea as being flawed. Look for a better phono stage rather than a cable or a power supply, etc as a band-aid for a present model. A better preamp will definately sound better.
-Bill

[rbrb]

Thanks for the advise, I think I will pass on getting the bigger power supplies.