Looking for advice and not sure where to place it. I have an older PC I5 750 with pci slots and an EMU-1212 with Gilmore Lite amp driving Grado Labs SR225. Recently my Wal-Wart died on one of the 15+/- and only one channel works… I’ve ordered another Wal-Wart but seen that they now have a dedicated power supply for the Gilmore Lite but at nearly the same price as the amp. My question is will that dedicated power supply make that much of a difference and if so will it be cheaper to build my own?

unholyb0b2 said:

  Looking for advice and not sure where to place it. I have an older PC I5 750 with pci slots and an EMU-1212 with Gilmore Lite amp driving Grado Labs SR225. Recently my Wal-Wart died on one of the 15+/- and only one channel works… I’ve ordered another Wal-Wart but seen that they now have a dedicated power supply for the Gilmore Lite but at nearly the same price as the amp. My question is will that dedicated power supply make that much of a difference and if so will it be cheaper to build my own?

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You need to supply some more information next time.  You specify all of this random stuff - PC I5 750, EMU-1212, Grado SR225, etc., yet your question is about the "Wal-Wart" and that's all you call it.  Further, you never reference where this "dedicated power supply" can be found and who is "they?"
 
I realize it's Headamp and have met/talked to Justin on a couple of occasions, but you've got nothing that directs someone to anything on his present website regarding the Gilmore Lite except that it's no longer made and sold.  A bit of further research revealed that he was originally supplying the Elpac power supply and then apparently upgraded to a true, linear-regulated power supply.
 
That took a heck of a lot of work to find, though.
 
Back to your question - the Elpac is/was generally considered "adequate" for quality audio, but no more.  Tangent did some tests awhile back (not sure if he has them on his site anymore) and Elpacs were in the single digits for mVrms of ripple, which is horrible.  You want something in the microvolt range (uVrums) around 60 uV or less - about 100 times quieter than the Elpac.
 
Yes, it makes an audible difference - sometimes a huge difference.  Whether it's worth it for you is something you have to decide.  As for building something, it's pretty much guaranteed that with a dual power supply you'd have to be messing with a transformer and line-voltage wiring (not many dual-supply AC walwarts around).  That's not trivial and not recommended if you aren't experienced.

Sorry TomB for the headache but thank you for your answer. I’ll be more specific with future questions.

http://headwize.com/?page_id=79 is the original source - I don't know how it evolved at HeadAmp
 
from eyeballing the circuit the psrr could be pretty high - 1st order is all good with ccs tail sources, matched fets, matching drain loads, heavy degeneration and gnd referenced V gain
 
 
the Gilmore article gives open loop gain of 35, the article's feedback setting a gain of 10 means ~ 10 dB more psrr from the negative feedback
 
 
gain of 10 is too high for grados - the 1 mW 98 dB SPL sensitivity in 32 Ohms is ~ 180 mVrms
 
and desktop sources today put out ~ 2 Vrms, DAP often 1 Vrms
 
 
http://headamp.com/home_amps/lite/index.htmI - looks like Justin went for a little lower gain, should mean a little more feedback/a little better psrr

I am they, but I no longer make the Gilmore Lite or the Dedicated Power Supply for it. The Elpac power supply was discontinued years ago. 
 
Buy an Astrodyne AMP-3002-10 ($72 on their website), and put a DIN-5 plug on it

Thanks all, I've found the same wall-wart on Ebay for $30: http://www.ebay.com/itm/ELPAC-WM071-1950-D5-NSPP-WM0711950D5-/231317923798?pt=BI_Control_Systems_PLCs&hash=item35db9f67d6
I'm not sure who recommended the Gilmore Lite with Grado's but it has served me well since 2005. When the power supply died and I noticed that HeadAmp at one time made a dedicated one... it just made me wonder...

Ressurection: Can you use the Headroom Astrodyne PSU with the Gilmore Lite? They both have +/-15V, both DIN plugs.

eugenius said:

  Ressurection: Can you use the Headroom Astrodyne PSU with the Gilmore Lite? They both have +/-15V, both DIN plugs.

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you can, but its not the same kind of DIN plug. you will need to chop the plug off the Astrodyne PSU and replace it with the DIN plug used on the Gilmore Lite. One that works is Mouser part # 568-NYS322G
 
Follow the pin-out of the Elpac WM071-1950-D5 wall wart that the Gilmore Lite originally shipped with

Thanks!
 
Now I only need to find out the type of connector Headroom uses, to get a female connector and make a Headroom to Headamp conversion cable. 

Headroom support as always was on point:
 
The Headroom DIN connector is the Switchcraft 12BL5MX.
 
The pinout of the connector is like this: