Question about Jensen LXA300 Car Audio Amplifier

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Trying to find out if my old amp is shot. i hooked everything up but the input from the sterio. and no lights come on. i check for power and there is 12 volts going to the amp and a good ground. do i need to have an input hooked up in order for the amp to work. i would rather know before i run another set of wires to the amp

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  • Rob Dez Jul 30, 2009

    i hooked up an input into the low signal input with the sterio running still nothing. checked the speaker box it's good. fuse is godd but the amp was sitting for about 8 years so i don't know what else to try i think it must be corroded

  • Rob Dez Jul 30, 2009

    that is something i didn't try. there is a screw between the hot and grnd that says RMT and it wasn't hooked to anything. as far as the power and grnd i had used a volt meter to make sure there was power at the amp. someone else on here at live chat had told me the amp will only come on if there is a signal going into it on the low input. i'm going to try and jump the RMT to the hot and see what i get. that makes a lot more sense thank you.

  • Rob Dez Aug 02, 2009

    i had added a switch beside the seat to the main hot running from the battery to the amp. After talking to you i ran a wire from the fuse box to the amp and it turns on/off with the key so everything works great. the amp is only running a big speaker box so the the main power switch is at least useful if i dont want all the base in town. thanks for all the help



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Posted on Jul 30, 2009

  • kennyls98751 Jul 30, 2009

    Is your ground on a Painted surface if so this can also cause a problem. Im sorry i wasnt aware that you had no lights. the remote wire has to be istalled as well. it should be a blue wire or a screw that says remote. it is what turns the amp on and off with the the position of the key if you just want to test it and already have a 12 volt and a good groun jumper the 12 volt to the remote or SWITCH on the amp. if you already have done this and ground is good and your sure your getting power it may be a fuse in the amp. if you have checked all this and still no lights Its Probably the amp.

  • kennyls98751 Aug 01, 2009

    No Problem, that Remote side has to have a 12v power it can be small gauge it only has to carry a signat to turn on the amp when the signal is lost the amp is switched off. Run this to a wire in your fuse box that comes off with the key so you dont drain your battery or you can install a switch to a constatly hot wire. Glad I could help.


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Hook a wire from your power antenna or your remote wire( not from both! one or the other!) on your deck(radio) to the RMT connection on your amp. all that connector is for is to give the amp 12volts to "turn it on". with out that wire your amp will not come on. i advise using the wire off of your deck simply because it is a regulated power source. the one from your battery lead WILL fluctuate and most probably do damage to the amp.

Posted on Jan 20, 2011

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