Hi @Alex_Leiva Alex,
Welcome to the Forum. There are plenty of very friendly people here to help you
It was a great idea to post diagrams. It makes things so much easier to assess.
There is unfortunately no empirical answer to your question. It is dictated by an a practical assessment and how you personally judge your situation. I will give you a completely extreme example :-
An Industrial Floor Conveyor System.
There are 200 motors on the system and if we said the motors would all run at the same time the Incoming Supply would be 250A. This Means the Cables to the Main Panel would be big, the switchgear would be big and the cost would be big. However for Functional Needs we know that only 20% of the motors could be running at the same time. So it is valid and practical to size the Incoming Supply and Switchgear to suit maximum consumption. So we end up with a 50 Amp Incoming Supply and Switchgear to suit.
It really is the same in your house. Will all the Speakers be Playing Maximum Volume at the same time ? If this is the case then I would size the Supply on the Maximum.
However there is another factor to consider. Power Rating and Actual Consumption You have recognised this in your post.
Another factor is the efficiency of your Speakers
And a “biggy” is to know whether you are using 24VDC or 12VDC Supply for your UPSTREAM V4 Amps.
And the length and size of the signal cables is also another potential factor
I’ll be happy to help with a calculation but I would need to know:-
- Make and Model of Speakers
- Arylic Voltage Used
- make & Model of Power Supply
- Approximate Assessment of Maximum Load (e.g 7 Speakers at 100% Volume or 7 Speakers at 30% Volume.
I will check out actual consumption figures as I have been meaning to do that for a while.
Hope this helps, Kevin