Hi 8AUSSIE8,
First, reality. The maximum power consumption is 547.2 watts at 14.4 VDC assuming zero voltage drop at 38 amperes. Extremely optimistic , and the output power will be much lower than the power consumption.
Okay, low battery power will cause higher current draw and heat leading to failures. So your power supply leads need to be heavy cable, as does the "ground" and the return from the chassis to the battery. Power and current is your enemy. These things limit performance and sound quality. Choose speakers for efficiency and put them in the correct sized box. We are dealing with physics. Low impedance speakers also make the amplifier work harder, decreasing sound quality. SPL matters more than the amount of power you dump in, plus speakers lose efficiency as their voice coils heat up. See? Current and power work against you.
Be realistic in your expectations.
First, reality. The maximum power consumption is 547.2 watts at 14.4 VDC assuming zero voltage drop at 38 amperes. Extremely optimistic , and the output power will be much lower than the power consumption.
Okay, low battery power will cause higher current draw and heat leading to failures. So your power supply leads need to be heavy cable, as does the "ground" and the return from the chassis to the battery. Power and current is your enemy. These things limit performance and sound quality. Choose speakers for efficiency and put them in the correct sized box. We are dealing with physics. Low impedance speakers also make the amplifier work harder, decreasing sound quality. SPL matters more than the amount of power you dump in, plus speakers lose efficiency as their voice coils heat up. See? Current and power work against you.
Be realistic in your expectations.