A simple way to identify the number of batteries needed for a car audio project is to add the RMS power of the Class D amplifiers and divide by 20.
The number 20 is an approximate value determined by our technicians to facilitate estimating the musical current consumption of the amplifiers.
For example, using an MD3000.1 amplifier, we have a total amplifier power of 3,000 WRMS.
Battery Current = 3,000 ÷ 20 = 150 amperes.
As can be seen in this section of the manual, the average consumption of the MD3000 amplifier is close to the consumption identified in our calculations, which is why we use this method.
Another example, now with more amplifiers, would be an MD8000.1, an MD5000.1, and a DS4000x4.
With this, we have 8,000 + 5,000 + 4,000 = 17,000 WRMS of amplifier power.
Battery Current = 17,000 ÷ 20 = 850 amperes
This would be the basic requirement for a musical project, and a very important note is that this calculation indicates only the minimum battery capacity needed for the audio system.
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