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Amp and Fuse Question

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Old Jan 20, 2007 | 07:14 PM
  #11  
zzzzzzz's Avatar
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then your good to go 4 more times LOL
Old Jan 21, 2007 | 01:21 PM
  #12  
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Originally Posted by ported
Sorry but i have a similar question, got 80x2 on my hifonics 1605d but i only have a 60amp on the battery for that amp .... it only blew one time when i had bass boost on...btw i am running the amp at full load (1ohm)
I would check the max current draw for that amp at 1 ohm. maybe it needs a 80a fuse. * the battery fuse is only meant to protect the power wire in case of an accident, and not the amp.
Old Jan 21, 2007 | 05:22 PM
  #13  
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Originally Posted by SweetnLow91SC
I would check the max current draw for that amp at 1 ohm. maybe it needs a 80a fuse. * the battery fuse is only meant to protect the power wire in case of an accident, and not the amp.
yea i knew that but if the wire can only carry 60amps without blowing the fuse then dosent it mean the amp is taking less than 60amps? yet it has 2 80amp fuses on it...thats why im confused.
Old Jan 21, 2007 | 06:58 PM
  #14  
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Originally Posted by ported
yea i knew that but if the wire can only carry 60amps without blowing the fuse then dosent it mean the amp is taking less than 60amps?
^ the amp only draws the high amperage when its being pushed... like cranking up 45hz boost at +18db etc at high level. and not when its at a moderate level.

yet it has 2 80amp fuses on it...thats why im confused.
if it has 2/80a on the amp..... and asumming the amp will pull that kind of current.... you should be running atleast #2+ guage power wire with a 160a fuse at the batt.
Old Jan 21, 2007 | 07:40 PM
  #15  
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what type of fuse???

Just like to add some theory on this question:

Mathematically, P (Power) = I (amperage/current)* V(Voltage) or I=P/V (this is the size of fuse supposedly inline with an amplifier).Example: your system (with load) is rated at 900W running with 13volts supply, your current draw would be about at 70 amp max(900/13). To be safe,a 60amp fuse would be recommended.
Old Jan 21, 2007 | 08:35 PM
  #16  
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Originally Posted by 4boyssss
Just like to add some theory on this question:

Mathematically, P (Power) = I (amperage/current)* V(Voltage) or I=P/V (this is the size of fuse supposedly inline with an amplifier).Example: your system (with load) is rated at 900W running with 13volts supply, your current draw would be about at 70 amp max(900/13). To be safe,a 60amp fuse would be recommended.
Thats a good theory, but you didn't take into account that the average A/B amp is 50% effiecient, so double your current draw.
The rest of the current is converted to heat.
Old Jan 22, 2007 | 02:16 PM
  #17  
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O.k. just got the spec for the Hifonics 1605d.

the amps is rated at 1600wrms @ 1 ohms, and its a class d amp. not sure what the dynamic power is tho.

no wonder you're poping the 60 amp fuse......
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