How many amps would these two draw??

[Bige441]

I have a 2003 RF power 551X from an old system and I now have a Hifonics BX1500D on my XXX. I have done the big three and got an optima red top under the hood but, the 1500D is still sticking it to my little 2.2 s-10 alt. I was just wondering how many amps these two amplifiers would draw at full tilt and rms???

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[no_vendetas 10+ year member]

Dont hold me to this but i think you add up all the ratings on the fuses on the amps

 

[helotaxi 5,000+ posts]

That will get you in the ballpark at least.

 

[Diplexers 10+ year member]

According to PPI as of 1998, add up the total wattage and divide by 12. That is what it says in my PPI PC450 amplifier manual.

 

[urwhatueati8god 10+ year member]

I have a 2003 RF power 551X from an old system and I now have a Hifonics BX1500D on my XXX. I have done the big three and got an optima red top under the hood but, the 1500D is still sticking it to my little 2.2 s-10 alt. I was just wondering how many amps these two amplifiers would draw at full tilt and rms???

W = V x A

V = W/A

A = W/V

A car produces 12 V when off from the battery, and approx. 13.8 V when on, so you're looking at approx. 108.696 amps when your car is on, and 125 amps when off. Now would anyone like ohms law explained in the process?

 

[helotaxi 5,000+ posts]

The above will give you max amps at 100% efficiency. No amp is 100% efficient. From Dom Iraggi, multiply the total wattage by .119 for a class A/B amp and .094 for a Class D. That will give you a pretty close estimate for max amps. For real world current draw divide that number by 3.

 

[Bige441]

thanks for the help guys

 

[78nova 10+ year member]

do you multiply the max wattage or the rms wattage, i know this is a stupid question but im a moron

 

[78nova 10+ year member]

do i only do the amps my amplifier is giving off or my head unit to my tweeters and 6x9's

ok ill shut up now