Current Draw?

 

Bronze Member
Username: Allstar71

Jefferson, Ga

Post Number: 30
Registered: Jun-07
How can I determine my current draw. I have 3 Orion amps Orion 1200d, and 2 Orion 4002.
The 1200d is running @ 3 ohms 500-600 rms and the 4002 are running @ 4ohms @ 100rms per channel.
I am running a total of approx 1000rms.
 

Gold Member
Username: Juliob

Santo DomingoDominican Re...

Post Number: 4781
Registered: Dec-05
get a 150A alternator.
 

Bronze Member
Username: Chuck78

Post Number: 69
Registered: Mar-07
power(watts)=amps X volts(14 for a car)

so to determine amps, watts/volts

also take into account amp efficiency, 80% for class D and 60% for a/b
 

Bronze Member
Username: Allstar71

Jefferson, Ga

Post Number: 31
Registered: Jun-07
Does anyone know where I can find one for a 01 Toyota Celica? Will this work? http://cgi.ebay.com/ebaymotors/Alternator-Toyota-2000-2004-Celica-1-8-4Cly-170AM PS_W0QQitemZ200127769917QQihZ010QQcategoryZ33573QQrdZ1QQcmdZViewItem
 

Gold Member
Username: N2audio

Lawrence, Ks USA

Post Number: 1353
Registered: Mar-04
"power(watts)=amps X volts(14 for a car)

so to determine amps, watts/volts

also take into account amp efficiency, 80% for class D and 60% for a/b"


and divide the answer by 3 if you want to know the current draw of music instead of test tones.

The ebay alt looks like it should work, but ~1000w rms isn't a ton of power. The stock 80A alt may be sufficient if you're not the type of person that listens at full volume all the time.
 

Bronze Member
Username: Allstar71

Jefferson, Ga

Post Number: 32
Registered: Jun-07
So what should I look for to know if I do need to get a HO Alt? voltage drops?
 

Gold Member
Username: N2audio

Lawrence, Ks USA

Post Number: 1355
Registered: Mar-04
Yeah.
Initially I would hook up a DMM at the battery with the engine idling, play the system at different volumes, see what type of voltage you're running. Then turn on electrical accessories 1 by 1 and see how the voltage is effected. Rev the engine a little and see what that does.
The only time you should see 12 ish is at idle, system loud, and about every driving accessory running. Other than that if you don't have 13+v you should probably look into an upgrade.
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