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External Linear PSU for Router - Voltage/Amps?

A technical question to aid in my rudimentary understanding of voltage and output.  How do I best match a replacement PSU to the wall wart voltage and amp output of my specific router -  a Netgear Orbi RBR 750 with specs showing 12V , 3.5 A DC ouptut.  I understand the 12V part but when viewing listings ( new/used ), I am finding most are showing amps above 3.5 with varying voltage.  

For instance a Teddy Pardo listing is showing a 15V 2A, and a TeraDak listing is showing 12V with either a 4A or 12A option.  How close to I stay to the V and A in my decision making?   I am looking to simply "clean" upstream a bit and wanted to start with a linear psu thats a reasonable $ amount ( $250 - $400) . Next step will be to add a switch.  Already have a solid ethernet cable ( Network Accoustics ) and streamer ( Aurender N200)  Also any recommendations on specific brands would help me out. 

norust

Showing 2 responses by erik_squires

erik_squires
16,679 posts
 

I should have added:  There was a case, the only one I know of, for a Chord portable DAC, that the device relied on a low amperage to protect the charging rate of the batteries.  IMHO, a bad design choice made against convention.

erik_squires
16,679 posts
 

Match the voltage, excess Amps is OK.  For instance: 12V, 8 A is just fine.

The reality is a lot of nominally 12V linear supplies may provide slightly elevated voltages when unloaded, so you may read say 13.8V on a multimeter.  That's fine, and even 15V might be OK.

So long as the voltage is reasonable, the Amps drawn will only be what the device needs, so even if you had a 10A supply, the device will still draw < 3.5A.

If you use a power conditioner, keep routers and switches outside of it so they don't pollute the clean side of the power.

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