Question about Kenwood KAC-8403 Car Audio Amplifier

Open Question

The red red light on front flashes and when it does it sends a thump through my subs kinda like they are breathing even when the radio is turned all the way down

Posted by on

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

JBL PB12 will have loud thump or pop!


First try to find the source of your problem. The easiest way would be to try your sub with a different audio source to see if the problem still occurs but is sounds more like there's a problem with the receiver.

Oct 18, 2012 | JBL PB12 Subwoofer

1 Answer

Amp not working, subs just thumping


U either have a bad ground inside your amp or radio or your rca's on the amp are loose

Feb 09, 2010 | Phoenix Gold RSD600.1 400W x 1 Car...

1 Answer

Amp won't turn on, red light on amp is flashing


DID THIS JUST HAPPEN ALL AT ONCE ? OR DID IT GRADUALLY HAPPEN? CHECK GROUND FROM AMP , INSTALL ONE FARAD CAP . STOCK RADIO ISNT REALLY HELPING , MOST AMPS OF TODAY TAKE A HIGHER SIGNAL FROM HEAD UNIT . ADD ONE FARAD CAP AND SEE

Jan 17, 2010 | Car Audio & Video

2 Answers

My subs don't bump to the beat, they just go THUMP THUMP THUMP...


It sounds like you need to ask for pro help mate, mybe the amp just needs setting properly, Is the amp on bypass for bass, or does the amp run the complete system

Jun 13, 2009 | Cadence TXA 750D High Power Mono Amplifier...

1 Answer

Only one thump when car is turned on. problem in amp strength or subwoofer?


try pluging in a diff, speaker to the amp see if u get sound.try powering the sub with a home radio just to see if u get sound at all if ur getting sound from the sub then its the amp but u could of damaged it when the amp over heated

May 03, 2009 | Kicker SoloX S10X2 Car Subwoofer

2 Answers

Amp protection


Hi, Off hand, I believe there is nothing wrong with the setup, maybe just not 100% compatible. It's just that the Sony Amp's protection is doing its job (just too good) and the stock radio is likewise doing it's job (but not too good). Just maybe, at poweron, the stock radio sends out a small burst output (maybe capacitor discharge) that we normally hear as a slight thump in the speakers which was when no Sony amp, ok. However, when you have added the amp, you also amplified the thump, which unfortunately the Sony protection reacts to. You can off course let it be since you have figured out a way to make it work or you can try and install a delay on for the power amp or separate it's power on from the stock stereo. The idea is to turn on the stereo with the Sony off and after a second or less, a manual switch or a delay activated switch will turn on the Sony. The idea is to switch on the Sony after the thump has finished. Good luck and hopes this gives you an idea. Pls post back how things turn up. Kind regards.

Aug 15, 2007 | Sony XM-2002GTR Car Audio Amplifier

3 Answers

Red LED "Protection Light is on" What is the problem


The red light means the amp is in protection mode. A few things can cause protection mode..... First disconnect the subs completely from the amp, and turn it on, if it powers up you have blown subs. Also try checking the main power wire at the battery...sometimes the current your meter is seeing is backfeeding from the remote wire, so your main power line could be blown at the fuse under the hood. hope this helps

Jul 17, 2007 | Crunch BlackMaxx BMX2250 2 Ch 1000W Amp...

1 Answer

Power light


This could be a DC offset condition. Check you manual for what this means. Or other condition. First Disconnect the Subs and try it. If it still goes red then disconnect the RCA's and try it again. If the Led continues to go red after the click then the Amp is hosed. The Click you hear is an internal relay that cuts the subs in after a dely so you do not get the turn on THUMP of the radio at your subs.

Jul 08, 2007 | Hifonics Titan TX 8805 Multi-Channel Amp...

1 Answer

Sub thumps repeatedly


since it still thumps i suspect the speaker is ok, but i suspect you have an electronic problem in the amp. since it is a powered sup & has the ability to auto turn on it has electronic circuits inside, take it to a service center for an estimate

Oct 01, 2006 | Paradigm PS1000 Speaker

Not finding what you are looking for?
Kenwood KAC-8403 Car Audio Amplifier Logo

Related Topics:

16 people viewed this question

Ask a Question

Usually answered in minutes!

Top Kenwood Car Audio & Video Experts

xxxxxx xxx

Level 3 Expert

4834 Answers

yadayada
yadayada

Level 3 Expert

74945 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7697 Answers

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

Answer questions

Manuals & User Guides

Loading...