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    ralph42794's Avatar
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    Amp turns on, won't power subs.

    I have a Legacy LA770 500WX2 CH amplifier with two Memphis 12" subs. The amp will power on and everything, but I have no sound out of the subs. I've tried so many things, different RCA cables, different ground, and everything. The biggest thing here is that I hooked up the subs to another amplifier and they worked fine, they hit hard and everything. I had everything set up the same. So what is my problem?







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    Re: Amp turns on, won't power subs.

    Gut pics of the amp? Have you tried hooking just one sub or different subs to it?




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    Re: Amp turns on, won't power subs.

    If the amp turns on and you get nothing out, check the settings on the amp. Otherwise either the RCA's are fried (Input) or the amp is bad (Output)



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    ralph42794's Avatar
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    Re: Amp turns on, won't power subs.

    Well, the subs are fine, because I'm using them with a different amp. The RCA's are fine, because I'm using the same ones. And I just bought the amp new, and it turns on and whatnot. So, I'm stumped. Oh, and this is a link to what amp I have.. http://incolor.inebraska.com/weisina...ages/la770.jpg




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    Re: Amp turns on, won't power subs.

    so open up your amp and show us guts



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    Re: Amp turns on, won't power subs.

    Quote Originally Posted by ralph42794 View Post
    Well, the subs are fine, because I'm using them with a different amp. The RCA's are fine, because I'm using the same ones. And I just bought the amp new, and it turns on and whatnot. So, I'm stumped. Oh, and this is a link to what amp I have.. http://incolor.inebraska.com/weisina...ages/la770.jpg
    get a better amp then bro




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    Re: Amp turns on, won't power subs.

    I mean the RCA's on the amp itself (The input on the amplifier). Sorry to say it, but Legacy is near the bottom for quality of construction. I have one in my closet next to a Pyramid amplifier (First two my father bought when I was in highschool). I wouldn't be surprised if it was defective.



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    Re: Amp turns on, won't power subs.

    How are they wired? What final impedance? Amp bridged or stereo?



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    Re: Amp turns on, won't power subs.

    You might try hooking up your iPod or something to the input on the amp to see if you get output then. Can help narrow down where your problem is. Use a cable like this:Monster® MusicConnect™ Portable Audio Player to Stereo Cable - RadioShack.com



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