Amp turns on, won't power subs.

[ralph42794]

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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[sacsking916 5,000+ posts]

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

 

[ultimate157 5,000+ posts]

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)

 

[ralph42794]

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/weisinator/images/la770.jpg

 

[elancohen92 10+ year member]

so open up your amp and show us guts

 

[sacsking916 5,000+ posts]

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/weisinator/images/la770.jpg

get a better amp then bro

 

[ultimate157 5,000+ posts]

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.

 

[keep_hope_alive Premium Member]

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

 

[Pataforce8 10+ year member]

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