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2x4 HD - what is minimum voltage necessary to power it ? 5 months 2 weeks ago #65078

  • jwendt99
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I’ve been using the supplied 12V wall wart to power my 2x4 HD, but recently got a Meanwell RD-50A dual output PSU (5V/6A & 12V/2A) to consolidate powering the 2x4 HD and a Topping E30II DAC.

The RD-50A has an adjustable 5V output.
The 12V output however is non-adjustable and speced at +- 7.0%.
The 12V output on the unit I got measures only 11.3V, which is within spec, but not close to 12V.

So, will the 2x4 HD work well with an 11.3V power supply or do I need to start looking around more? (or build one)

Has anyone found a different dual-output (5V & 12V) power supply for this sort of application?


As an aside, I did notice this Note in the RD-50 Series datasheet:
   3. Tolerance : … when multi-channel output, it is recommended that CH1 load > 10%
(assuming this actually would help raise the 12V output voltage) this would mean drawing 600 mA from the 5V output, which is far more than the E30II requires. I suppose I could put a power resistor (8R 3W) across the 5V output, but it seems rather silly to just burn 600mA all the time for no good use.

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