[SoCalWJS]

Finally found a Linear Power Supply for my A5, time to enjoy~

What did you get? How is it working?

[Jon L]

Definitely giving up a little bit in ultimate clarity and pinpoint imaging but the fullness and weight of images are back with the Jolida.

Nothing wrong with adding a little bit of NOS tube flavor to the signal chain of A5..

[nlitworld]

Holy opamp rolling Jon! I've read your posts comparing a bunch of them, but seeing them all on display is just cool. Definitely makes you curious on "season to taste " with some good ones. 

[Jon L]

It's all for fun.  I'm glad I found the good ol' OP2604 to work so well in the Aiyima tube preamp despite all the discrete opamps I tried.  In this hobby, one simply has to try things in the specific setup 

[NXSTUDIO-DRUMMER]

My assessment, between a GaN versus LPS power supply. LPS wins hands down!

[nlitworld]

So... do you have a link or some info for that LPS where to buy? You can't tease like that! Or at least specs if you built one out from an Antek toroidal  unit.

[genjamon]

His original post said he got a used Acopian unit from an IT center or something for $35. Looking at their new 48V 5A or 10A units, they go for around $1k or more. So $35 is a steal, even used. There are some similar used items out there for around $200-400 it seems. Unknown condition or reliability gives me pause, though.

[NXSTUDIO-DRUMMER]

You would be correct,
I did buy it used from a studio that was doing renovations.

[genjamon]

Can you remind us how many amps yours delivers?

[NXSTUDIO-DRUMMER]

I have multiple LPS's, two of them are 8.5 amps, another has 10 amps of current.

[WGH]

His original post said he got a used Acopian unit from an IT center or something for $35. Looking at their new 48V 5A or 10A units, they go for around $1k or more.

Acopian power supplies are always available on eBay, I have bought a couple. Yes, the supplies are built like tanks and for all practical purposes will work forever. Acopian power supplies have exposed AC and DC connections and need to be tucked away from small children with forks.

First I look up the model number based on the volts and amps needed then look it up on eBay.
https://www.acopian.com/power-supply-voltages/powersuppliesbyvoltage.aspx?min=48


A 48 volt 8 amp Acopian W48MT8 is $200 including shipping on eBay.
https://www.ebay.com/sch/i.html?_nkw=acopian++W48MT8&_sacat=0&_from=R40&_trksid=p4432023.m570.l1313

A 48 volt 5 amp Acopian 48PT5 rack mount with meters is $110 - $160
https://www.ebay.com/sch/i.html?_nkw=acopian+48PT5&_sacat=0&_from=R40&_trksid=m570.l1313&_odkw=acopian++W48MT8&_osacat=0

[NXSTUDIO-DRUMMER]

.

[genjamon]

Cool that there are other good options! Can’t tell if you’re saying one sounds better than the other, or if they both sound equivalent. Can you clarify if you hear a sound quality difference between the two?

[NXSTUDIO-DRUMMER]

Cool that there are other good options! Can’t tell if you’re saying one sounds better than the other, or if they both sound equivalent. Can you clarify if you hear a sound quality difference between the two?

They have the similar qualities, with the exception of one having more amperage, delivering more headroom, for dynamic peaks. Higher voltage models will also provide higher decible output as well.

[genjamon]

Thanks for clarifying - awesome that it works just as well!

[NXSTUDIO-DRUMMER]

Your Welcome!

[goggle1824]

NXSTUDIO-DRUMMER,

Why have you already have sold the A24H850 ?

[NXSTUDIO-DRUMMER]

Answer, I have multiple LPS's, therefore selling it.  Update sold to a friend

[genjamon]

Just an additional note of caution that not all Acopian units are linear power supplies. Some use SMPS - even ones that have regulated outputs. A lot of the Ads will say regulated, but not mention whether it’s a linear power supply (ie, uses a transformer) or is an SMPS. As mentioned a lot of the benefit from linear power supplies is their inherent galvanic isolation through use of transformers. While SMPS often measure cleaner than linear supplies, my theory of why a lot of us still prefer linear supplies has to do with this inherent rejection of grid noise.

[NXSTUDIO-DRUMMER]

I've basically completed my objective obtaining a LPS.