
Measurements and conclusion
Contents
We tested the Plixir Statement on the DC load and saw how it responds to a sine and square wave. That indicates something in terms of speed of power supply. We also looked at the noise floor.
To see how it handles mains noise, we fed the Plixir with the ASR-2050. We did both a “clean” measurement and a measurement with DC offset (2.5V) and noise injected through the function generator (white noise). It is remarkable how differently devices handle this.
Plixir Statement 5 volts
Plixir Statement 12 volt
Differences 5 and 12 volt version
The Plixir Statement shows some good things and some not so good things. Looking at the noise floor, it is just fine. We see a start around -140 dBFS and it even drops below -160dB from 20kHz. Between 60 and 70 kHz there is a peak. But it remains below -140 dBFS.
However, we also see quite a series of 50 Hz harmonics. These are gone when we are past 2 kHz. Now there are more power supplies that exhibit this, but in this price range we don’t think this is necessary. The Pura Dodo, for example, does this more cleanly.
If we look at loaded, unloaded and handling of noisy sources, this is in itself just fine. The noise does rise slightly with load, but not too much. The Plixir handles noise nicely; partly due to the balanced construction of the toroidal transformer, DC and noise do not really have a chance to get past the DC output.
Interestingly, the 5-volt version exhibits lower noise at rest than the 12-volt version. However with load it pulls even.
The stability of the power supply is decent up to about 3 amps. After that the lines start to show some wrinkles on both power supplies. Now you will not often need more than 3A, but it is something that is noticeable. We can also see that the voltage from that point on slumps a bit more than we like to see. This is not a power supply to load very heavily, we estimate.
The competitors
We can say that there are many power supplies on the market. And then both inexpensive and pricey models. To name a few brands: IFI, Farad, Ferrum, Keces, Plixir, Pura, LHY, Jayz…. and of course: Sbooster.
All offer quite a few options. And they offer quality. But which ones are really good? And which ones are less interesting?
It is difficult to say, because it is a matter of finding the right marriage. The interaction between a power supply and device is very important. The power supply is a tastemaker. One model brings calmness and warmth and another offers speed and transparency. So it is crucial to think about what you are looking for. Only then can you start matching.
Don’t mean to sound nerdy, but i’m going to place my 2 plixir and 2 Sboosters on a shelve and was wondering about vibrations, should i place say a rubber mat under each unit or use mini spikes so that the vibrations if any dissipate through the wood?
Nope. Its fine!