Question about Legacy Audio LA1030 Car Audio Amplifier

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LA-1030 Protect Mode

Its the Legacy LA-1030 1000 Watt 4ch Amp and it has the option to bridge each 2 channels (so you end up with a 2 channel amp) and i have 1 4Ohm sub bridged across channels 1 and 2 and channels 3 and 4 are empty when it starts pushing the subs its not clipping or anything, but it goes on protect. whjat do I do to fix this because to get a new amp is about $350 which i dont have for car audio right now but i would really like to keep my system. and the thing i dont get is how it sounds fine and doesnt even clip, so why would it go on protect?

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  • Eric May 23, 2009

    I don't think thats it, because its fine when its real low, but when i go to turn it up on the amp to make it how its supposed to be it goes on protect. and channel 3 & 4 are turned all the way down but when i start turning up channel 1 & 2, it gets to a point where it sounds good and its not clipping or anything and it just goes up protect.

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  • 1,348 Answers

You have an unloaded channel,so the voltage is exceeding what the protect circuit is supposed to see.you have to connect an 8 ohm resistor across the output of the unused channel.
do not drive a signal into it or you will smoke the resistor.
a 10 watt will do ok with zero signal input

Posted on May 23, 2009

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