Question about Jensen KA3 Car Audio Amplifier

1 Answer

Both green and red ligt or on my jensen ka3 i dont know what it means i had it working b4 i swaped my subs for some new ones and the amp dosent work now.i dont know if is because of the red light but i have no idea what the red light stands for so can some one help me out plz

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 631 Answers

Generally, the power light is green and the protect light is red. If the protect light is on there could be a short in the wiring or there could be an internal fault in the amp.

Disconnect all speaker wires from the speaker terminals of the amp and disconnect signal cables from the amp. If it powers up, the wiring needs to be checked. If it still shuts down (goes into protection), the amp likely has blown output transistors.

Posted on Dec 28, 2007


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

Hey i dont know to much about amps, but me and my friend (he knows a decent amount about amps) would plug the power into the amp and the green light would come on. Though when we plug it into the subs, the...

Are you connecting positive to positive and negative to negative from the sub to the amp? If so, try positive to positve (+) in the far left channel and then the negative to negative (-) on the far left channel to. If no luck do the same in the other channel with one sub at a time. Try one sub at a time, Dont try an connect 2 or more subs to one channel as this would cause the amp to go into protect mode (red light you describe). Usually the positive wire has either a line down the wire, writting on it or has a red seperate wire with it when wire end stripped to connect it. Hope this helps and please rate...

Mar 11, 2011 | Bazooka EL1500 Car Audio Amplifier

1 Answer

Dont know how to wire a subwoofer


The Jensen XS1010 is a 4-ohm sub and should work properly off of the outputs of most any single channel monoblock sub amp or off a bridged 2-channel. You did not say what brand or type of amp you intend to use, but in any case, there's only 2 wires to connect to the sub, one positive (+) , the other negative (-). Simply match them up with the positive and negative on the amp speaker output and you are ready to bump.

Here's the link to Jensen's website:

I'd recommend downloading the XS1010 manual. They recommend an enclosure with at least .75 CuFt internal volume.

If this helps, please rate it as "FixYa". Thanks!

Mar 28, 2009 | Jensen XS-1010 Car Subwoofer

1 Answer

Jensen uv8 and amp hook up

Remote wire from Jensen is blue or blue/white. Use Blu/white if there is one. . RCA's, for subs, use the rear if no subwoofer pre-outs are available. If unit has sub pre-uts, use them as the head ubit (stereo) would have a level that can be raised or lowered thus giving you more control over the input to the sub amp.

Jan 28, 2009 | Jensen VM9510 Car DVD Player

1 Answer

My subs heve stoped morking and i dont know why!

try check that you have connected the positive to the positive from sub 2 amp.if that dosent work try gt new rca leads

Dec 13, 2008 | Car Audio & Video

1 Answer

Amp works when beaten

It sounds like you have a broken connection in the amplifier. The first thing to check is the fuse. Sometimes the contacts become weak on the fuse holder and the connection becomes intermittent. Any other troubleshooting would require opening up the amp. Any repairs would require resoldering the broken connection.

Let me know if you have any other questions.

Sep 22, 2008 | Jensen XA2250 Car Audio Amplifier

1 Answer

Fusion sub n amp dont work

didi u check ur fuses in the amp..if not there check the fuse under the hood on your power wire.i had the same problem

Jul 27, 2008 | Car Audio & Video

1 Answer

A300HLX Amp + 600 Watt JL Audio Sub

Ill go for a better GROUND , sounds like its not grounded properly and thats why the RED LIGHT . DO A RE CHECK on the installation . hope this helps

Apr 29, 2008 | Jensen A300HLX Car Audio Amplifier

1 Answer

Jensen 300 amp unknown

go to the harman kardon site and download the owners manual and u can order any thing you need including a new wiring harness

Apr 05, 2007 | Jensen LXA300 Car Audio Amplifier

1 Answer

Amp not working

What's the problem? It's not unusual to get a spark when you connect power to an amplifier; there are capacitors in the amp that will charge. Is the amplifier not working?

Jan 29, 2007 | Jensen KA3 Car Audio Amplifier

2 Answers

Kenwood kac-9152d

by jump do you mean all it does is thump and no sound besides thumping noise? if so put a better ground on your amp, double grounds work the best. please reply

Oct 06, 2006 | Kenwood KAC-9152D Car Audio Amplifier

Not finding what you are looking for?
Jensen KA3 Car Audio Amplifier Logo

Related Topics:

248 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jensen Car Audio & Video Experts

xxxxxx xxx

Level 3 Expert

4905 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

The Knight
The Knight

Level 3 Expert

74999 Answers

Are you a Jensen Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides