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Old 28th November 2005, 08:19 PM   #11
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I would have to politely disagree with your assessments of the NAD PP-2 as I have found that what you guys say about it in this thread is only partly true.I did get burned once with the earlier model the PP-1 and I agree that it was for the most part a "disappointing" unit,but the PP-2 is different.The thing that won me over was to upgrade the power supply from the "poor" unregulated version that comes with the unit to a regulated one and Voila! bass,dynamics,detail etc.It is so good in fact that it bests a Moth 30V series 12v Phono Stage currently sold online for 275 Pounds-3 times the NAD's price.I lie not as I have done the A/B and the NAD wins.It is a poor sounding unit with that awful stock supply no bass etc,much as described,but once it doesn't have to fight for power it is quite a nice little unit for the money,better than the Creek also I hear.
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Old 30th November 2005, 07:18 AM   #12
Franz G is offline Franz G  Switzerland
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Indeed, this could be a big change, a good tweak for the PP2, to use a state of the art psu.

But you will still have FOUR electrolytics in the signal path. I for myself, I avoid such a signal path in my phono equipment. Just my personal opinion, of course.

One good cap at the output of a phono pre should do the job. Should you worry about an expensive cartridge, why not a cap at the input or, for a MC, a stepup transformer.

Again: for the same money you spend for a PP2, you easily build a phonoclone or VSPS in very good quality, including psu.

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Old 30th November 2005, 06:00 PM   #13
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You are right,of course it is cheaper to build it yourself,but if you have the stock NAD-PP2 already,a quick upgrade is to replace that unregulated power supply unit.There is a guy on Audiogon that does just that,selling over-priced, larger,unregulated(still) power supplies(up to 1000mA I think).What to do is make sure you get a regulated power supply unit mine is 24VDC 1Amp regulated,really did the trick!
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Old 22nd January 2006, 08:04 AM   #14
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Default unregulated(still) power supplies(up to 1000mA I think

Quote:
You are right,of course it is cheaper to build it yourself,but if you have the stock NAD-PP2 already,a quick upgrade is to replace that unregulated power supply unit.There is a guy on Audiogon that does just that,selling over-priced, larger,unregulated(still) power supplies(up to 1000mA I think).What to do is make sure you get a regulated power supply unit mine is 24VDC 1Amp regulated,really did the trick!
I am thinking of buying a NAP PP-2. Sorry about my ignorance but what do you do with the original power supply?
Thanks
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Old 22nd January 2006, 08:53 AM   #15
Franz G is offline Franz G  Switzerland
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Quote:
Phono January 2006 (Extra Issue of a german HiFi magazine about PP2):

"... hohe Rausch- und Verzerrungsfreiheit und die niederkapazitive Auslegung."

Translation:

"... low noise and low THD and the low capacitance layout"


What capacitance? The electrolytic caps in the signal path?



Franz
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Old 28th February 2007, 09:51 PM   #16
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What sort of regulated supply are you using? Is it a linear or switched regulated unit? I'm interested in upgrading and have not found a 1A 24V DC linear regulated power supply.
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Old 1st March 2007, 11:17 AM   #17
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You should be able to find something like the existing power supply that comes with the NAD PP2 only rated at a higher current output.A 500mA unit will work pretty well also.This guy sells the 1000mA upgrade.http://britaudio.com/NADPP2.html
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Old 14th March 2007, 05:48 PM   #18
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Does anybody know the exact size of the barrel connector for the DC power supply for the PP2? It seems to be smaller than the standard 2.1x5.5 provided with most power supplies.
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Old 14th March 2007, 09:49 PM   #19
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The one on my upgraded 24v 1Amp DC Power Supply is 2.1mm x 11mm.The 11mm being the silver tube length itself.These should be available in Radio Shack stores
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Old 16th March 2007, 08:46 AM   #20
tubenut is offline tubenut  South Africa
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Bigger PSU always helps on these affordable add on boxes.....
Well sadly, even on my ECP1 from Electrocompaniet too...

The supplied wallwart of the PP2 uses a whole 470mfd of smoothing before entering straight in to the regulator inside the unit. Just adding capacitance there helps a lot, in the box or in the wall wart. Soft recovery diodes as well. That opamp, yes, so many other choices, pick your flavour.

Ofcourse all those electrolytics in the signal path come from the lowest bidder......

WRT to a regulated PSU, I have not tried that on a PP2 yet but I have before on a Electronics and Wireless World design and distinctly preferred +-15 V supplies single regulators to feeding these into another set regulating down to +-12.
Could have been headroom of the PSU or current limiting that made the difference I suppose but thought +-12 should have been fine....
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