E&OE Copyright 2010-
Project Power Box RS Uni Power Supplies
The Uni power supplies are high quality Linear supplies designed to be used with certain Pro-
Before discussing them, here’s a bit of background (skip down a couple of paragraphs if you’re already sold on Linear supplies!).
Switch Mode power supplies are primarily used by manufacturers because they are small, lightweight, very efficient (particularly when no power is being drawn) and cheap. They work by increasing (switching) the 50Hz mains supply to a much higher frequency, theoretically well above the audio band. The downside with most Switch Mode Power Supplies is noise, not only do the supplies have high frequency hash imposed upon the DC output they can also radiate physically and even back onto the mains supply, ready to impact other items plugged into the mains nearby.
When comparing Switch Mode supplies against Linear ones it’s always wise to do two comparisons, firstly the Linear supply (with the switch mode unplugged from the mains) against the Switch Mode. Secondly listen just to the Linear with the switch mode plug into the mains (but not connected to the item) and then removed. What you will normally hear are the biggest improvements on the first test, but even on the latter there’s often a lifting of grain and hash from the sound.
Above: Black Finish Pro-
There are two versions of the Uni, the only difference is the number of outputs. The Uni 1 is designed to run a single item, the Uni 4 can run up to four. Both are housed in the same deceptively near half width case that all the other Pro-
I wont go on at great length again here about the sonic improvements as I have done so on some of the pages featuring the products that run off these boxes. However I can confirm that they do offer a significant upgrade over the standard power supplies. Undoubtedly a large amount of this is due to the reduction in high frequency noise, but they are also a lower impedance and higher current supplies, which explains the gains in dynamics, bass control and depth.
Above: rear of Pro-
Some items can be plugged straight into the Uni Box, these include the CD Box RS, DAC Box RS, Head Box RS, Pre Box RS, Pre Box RS Digital and Stream Box RS.
It is also possible to use the power supplies with certain Pro-
RPM 5 Carbon
2 Xperience SB
6 Perspex SB
RPM 9 Carbon
RPM 10 Carbon
Xtension 9 Super Pack
High Powered TT-
Xtension 10 (DC models, sold after December 2012 only)
Xtension 12 (DC models only)
Project Power Box RS Uni 1way, power supply upgrade: £349.00
Project Power Box RS Uni 4way, power supply upgrade (4 output version designed to power multiple compatible items) : £549.00
Project Power Box RS TT turntable Lead Standard power: £45.00
Project Power Box RS TT turntable Lead High power: £45.00