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Old Yesterday, 02:35 AM   #1
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Default How much power do I need?

Hello everyone, I'm new of this so I hope to write this post in the correct section, Basically I need to power my audio rack which has 3 amplifier rated at 15A power consumption and output power stereo RMS @4ohm 2x1200W, one crossover, 2 turntable , 2cdj, 1 laptop, 1 dj mixer, which main supply do I need to run everything smoothly? 16A? 32A?

Any help/advice will be more than welcome as I don't have any knowledge about electricity, many thanks
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Old Yesterday, 03:15 AM   #2
rayma is offline rayma  United States
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Quote:
Originally Posted by MatHz23 View Post
I need to power my audio rack which has 3 amplifier rated at 15A power consumption and output power stereo RMS @4ohm 2x1200W,
one crossover, 2 turntable , 2cdj, 1 laptop, 1 dj mixer, which main supply do I need to run everything smoothly?
If each amp potentially draws a maximum of 15A of current, then you need 45A capacity total. The rest of the equipment can be neglected.
Make sure that the circuit you plug this into can supply this amount, or you will trip breakers or blow fuses. You probably will need to use
more than one circuit to supply the power.
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Old Yesterday, 07:01 AM   #3
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Some of the questions you need to ask yourself may include:

Do I just focus on the power amps, as all the other equipment really only draws a relatively minor level of power from the mains?

How does my power amp draw power from the mains, because it might use a unity power factor power supply or it might use a simple rectifier with capacitor input DC type power supply?

Have I read my amplifier specification properly, and either contacted the amp maker or done a sample rms current measurement on one amp when it is putting through the worst-case sound level I want it to do ?

What is the short-term average power that would actually be sent to the speakers, as it could need speakers rated at a combined 2x3x1200 = 7,200W ?

What options do I have for mains connections, as it could be 1 ph, 2ph, 3ph ?
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Old Yesterday, 07:32 AM   #4
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Chances are you'll never pull more than 30 amps but I'd check my in use current to be sure.
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Old Yesterday, 03:50 PM   #5
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Many thanks for the quick response, so a PDU with main supply at 32A like this is not enough to run everything?

https://www.studiospares.com/Cables-...nit_450270.htm

What do u suggest? How should be the correct "flow"?

It will be for a "mobile' project so I need to have a PDU in the rack to take power for just one source, I think
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