UnitiServe Power Supply

Posted by: What's My Name on 29 November 2011

I can't find out a lot of information about this power supply mentioned in the UnitiServe manual so I'm presuming this is just a simple AC/DC converter, the like of which you get with many products ?

 

My Turntable is the same so I'm purchasing a rather more up market dedicated AC / DC converter. It comes with two DC outputs so the 2nd could be used for the UnitiServe. That said I can't find out what the DC output voltage needs to be for the UnitiServe. Does anyone know ? 12v, 15v, 24v ?

Posted on: 29 November 2011 by sangsang

12V

Posted on: 29 November 2011 by sangsang

12V is listed on the back side of Unitiserve's original AC/DC converter.

Posted on: 29 November 2011 by Manu

But it needs 4.2 A, this is the trick...

Posted on: 29 November 2011 by What's My Name

Yes, 12v is no problem but 4.2A makes it a bit more tricky.

 

I was looking at something like this (http://www.acoustic-fun.com/catalog/product_info.php?cPath=23&products_id=73), can run my Turntable from it as well. I don't have the UnitiServe yet although as the KECES unit has two DC outputs makes sense to get one that can do both the UnitiServe and my Turntable.

 

Anyone else "upgraded" the AC/DC converter for the UnitiServe ? Any recommendations ? Any improvements ?

Posted on: 30 November 2011 by sangsang

Suggest to use the AC-DC converter which supplied with Unitiserve although it is made in China by ROHS,  the power code is fixed with a filter with Naim logo. The SQ is good but noise injected to my subwoofer via Unitiserve > DC1 > Supernait > RCA (AV Bypasss) > AV Amp once switched on the Unitiserve, tried Toslink without noise injected. 

Posted on: 30 November 2011 by Purity of Essence
Originally Posted by sangsang:

       

         class="quotedText">
        Suggest to use the AC-DC converter which supplied with Unitiserve although it is made in China by ROHS, .



I think you may find RoHS "make" an awful lot of products.

http://www.rohscompliancedefinition.com/

Also - by 'noise' in your system do you mean hum?

With all those bits and bobs connected you have a classic opportunity for an earth loop

Possible solutions have been discussed many times on the forum.
Posted on: 30 November 2011 by Massimo Bertola

Is this the same Rohs?

 

http://www.rohs.com/

 

M.

Posted on: 30 November 2011 by Manu

WHAT they ran out of business, It seems all my electronic products are made by RoHS and CE, hope CE will continue.

Posted on: 30 November 2011 by james n
You've got two items here with totally different power requirements. The TT, low current, low noise, the US, high current, and a rather electrically 'noisy' component. I'm sure that Naim will introduce a shoebox sized PSU to match the US at a later date for those who want a hefty linear supply.
 
Are you concerned about an SMPS being close to your system or want better performance from the US ? 
 
If the latter, i'd say the SN internal DAC will be the bottleneck here rather than the US digital output.
 
James
Posted on: 30 November 2011 by What's My Name

Thanks for this James, very helpful. After looking more closely at the power requirements for this two items its clear they are very different animals. TT runs at 450 mA 12V. Will focus on the TT to ensure I'm getting all the performance I can from it.

 

As for the US, lets see if we do see something from NAIM to maximise the power supply.

 

The unit I mentioned to replace the AC/DC converters are not really that expensive so why not, I'm sure it is going to provide some benefit.