Question about Legacy Audio American Legacy II LA290 Car Audio Amplifier

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My american legacy amplifier

I need a couple of parts for my amplifier circuit board one of the diods i think they call them is broke i need a new one it has a yellow head with a number like (0503) or (D503) and the circuit board says (TH1) and the other one i need is a black square with 3 prongs on it and the number on that is (IRFZ44N)
(ITR339G)
(CE 70 7E) JUST LIKE THAT ON TOP OF EACH OTHER IF YOU KNOW WHERE I CAN GET THESE AND WHAT SIGHT AND PRICE PLEASE LET ME KNOW CAUSE I NEED THEM MY E-MAIL ADDRESS ID (BLESSEDTHUG79@YAHOO.COM) MY NAME IS PAUL THANK YOU.

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TH1 would be a termistor. How is it broken?

The IRFZ44N can be replaced with the following part from Mouser.com.
844-IRFZ44RPBF

You'll need to replace all of the IRFZ44 FETs.

Let me know if you have any other questions.

Posted on Oct 07, 2008

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Anyone can help me please?


Can't really find anything about them but maybe if you contact Legacy and beg a little they might have a circuit diagram hiding away somewhere. Here:Legacy

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CAN THE AMERICAN LEGACY SERIES 2 LA490 AMP HANDLE A 2 COILS 12'' KICKER SUBWOOFER??


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1 Answer

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No wired bass control knob - reply back from original posting


i would not worry about that really you dont need it i know install more than five hundred of them

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What size fuse do i need for amp


start with a 50, may need to increase it if you are not using a large capacitor.
600 watts = 12x
x= 600 watts / 12 volts
x = 50 amps

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2 Answers

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check for pinched wire causing ground loop. Screws and seats are easy culprits. If you have a spare RCA... or can borrow or buy a cheap one... run it from the radio to the amp without routing the wires in the car and test.
Possibly could be hitting metal behind radio. Be sure to secure and tape wires.

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1 Answer

Constant thumping


Theres most likly an open ground printed circuit trace on the Printed circuit board on the bottom. first clue is You said your girlfriend disconncted and blew the fuse. You gonna have to ytake the amp apart and totally disassemble the PCB off the rails and everything unless theres a bottom cover. It may be an obvious burn or could be hidding under the green paint of a trace?? Goos luck

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