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Question about Legacy Audio LA1490 Car Audio Amplifier

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Amp not working at all...need schematics

I have an American Legacy Series 2 1600 watt amp. MOdel number LA1490. It was given to us by a friend, becuase it doesn't work at all. We opened it up, and fixed a thing or two that was obviously broken, but....it still doens't work. It looks like maybe there may be a broken solder connection, but I need to get ahold of the schematics of the inside to see if the connection really is broken. Anyone know a source for that? Thanks!

Posted by Becky Moore on

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Source for what? schem? is it powering up or no sound?

Posted on Aug 08, 2007

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I need to know the size of external fuses for a american legacy amp 2000 watt 2 channel 1990

25 to 30 amp fuses will work great, anything lower could possibly blow a fuse when a good bass note hits even if there is nothing wrong with the amp. Hope this helps.
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Whats rms on legacy la1490

http://en.wikipedia.org/wiki/Root_mean_square
In mathematics, the root mean square (abbreviated RMS or rms), also known as the quadratic mean, is a statistical measure of the magnitude of a varying quantity. It is especially useful when variates are positive and negative, e.g., sinusoids.
However, the term "RMS power" is sometimes used in the audio industry as a synonym for "mean power" or "average power". For a discussion of audio power measurements and their shortcomings, see Audio power.
http://en.wikipedia.org/wiki/Audio_power
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Subs

I looked up that amp, it doesn't have a listing for 2ohms x1 but it has 2 ohms x 2 and its at 250watts. For this situation, I would recommend a different amp or different subs. Right now you are getting the most you can get out of your sub/amp combo, if you only have single voice coil subs. Which is common in the mtx preloaded boxes. Either you want an mono block amp stable at 2 ohms or 2 dual 4 ohm voice coil subs. If you got the subs you would wire the voice coils in series so you could get 8 ohms then the subs in parallel so you could get 4 ohms, which would be the best for that particular amp. Good luck.
-Andrew Hawkins
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Wondering why im blowing fuses

The most common reason for an amp (in good working order) to blow fuses is a speaker load that's impedance is too low. You may need to rewire your speakers.

Let me know if you have any other questions.
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