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Old 23rd September 2010, 04:14 PM   #1
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Default MA Audio AMP

Im working on this amp not sure what modle it is .

The power supply fets were all shorted . I replaced thoose all gate resistors checked fine.

But when i looked at the drivers on the board it looks like someone has replaced them at some point but there are 2 2SA1023's

Isnt one of them suppose to be a 1027? Cause with just power and ground connected it draws 60+ amp of current.

If 1 is suppose to be the 1027 how do i tell which location it goes in?
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Old 23rd September 2010, 06:25 PM   #2
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The collectors of the PNP drivers will be directly connected to ground. Are there any drivers that don't have their collectors connected to ground?
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Old 23rd September 2010, 07:27 PM   #3
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I figured out the problem in the supply part.

Now im rebuilding the output section.

The model number on this amp is HC4002.

This amp says it will do 4000 watts @ 1ohm Which i highly doubt.

How Do i figure out how much this amp really does ?
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Old 23rd September 2010, 08:59 PM   #4
Genfry is offline Genfry  Italy
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Quote:
Originally Posted by mike49504 View Post
.

How Do i figure out how much this amp really does ?
considering efficiency = 100% (it's not true!)
P=V*I 4000W = 12V(battery) * I
I = 4000/12 = 333 A

how big are the fuses ?
4*100A ? the power declared seems to be really.
otherwise...
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Old 23rd September 2010, 09:45 PM   #5
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The only way to know how much power it will produce is to measure it.
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