20 Most Recent Kenwood KAC-8403 Car Audio Amplifier Questions & Answers

it could be a indication of low amps.

Does it happen when car is running and lights are on?

If car is off do lights dim to the music at night?

You could be using more power than your alternator can supply.

Most alternators are capable of producing 55-65 amps. This is adequate for sound systems producing up to 350 watts RMS. Some more modern vehicles have alternators rated up to about 120 amps. This will be sufficient for systems of up to about 600 watts. Some pre-1985 cars, on the other hand, have alternators only rated for 35 amps. This will only support about 125 watts in amplifier power.

One easy, effective solution maybe installing a capacitor. Heavy-duty capacitors connect to the power cable (just before it reaches your amplifier) and act as a buffer zone between your amp and your car's electrical system. They store up a reservoir of power which can supply the amplifier's peak demands (like a bass drum beat) without having to draw current from the battery.

First, Check your earth is excellent and not all clustered on one point. Ensure power leads are thick and secure. Separate speaker and power cables.

Check auto turn on wire (thin blue on amp) is not connected to lights power source, use elect aerial output on head instead

Run 4 gauge earth wire to car body near amp, power cable must be heavy gauge too, expessally with a sub woofer running.

Kenwood KAC-8403... | Answered on Feb 08, 2008

well, first thing you need to check is to see if the amplifier is going into protect mode(red light coomes on). also go through and check all your wiring with a test light(buy at autozone, oreillys, napa walmart, etc.) and see if its all right. (positive, ground, and remote) then check your rca with i dont think is possible so you might as well buy knew ones. if all that doesnt work then make sure all wires are hooked up to the speakers, take the apekers out of the box and check. if all fails then bring it to a car audio shop to let them take a look,

Kenwood KAC-8403... | Answered on Oct 10, 2007

OK I believe there is a small indented "Reset Button" around somewhere on the back of the unit, With the unit powered ON, & using a small diameter implement, straightened paper clip etc, press IN the button and this should "Reset" ya unit. This may indeed fix all your problems as the Unit "Reads" the speakers at turn on.

Kenwood KAC-8403... | Answered on Aug 08, 2007

Sandbox games are my favorite! All the Sandbox Games are awesome!

Kenwood Car... | Answered on Apr 01, 2020

Hi Trey, i understand that you not a technician, what i do advise is to first get your head unit bench-tested, have all the output channels and currents checked thouroughly.
If that doesnt sort the problem then try a different head unit as a process of isolation.
If the problem still persists with a new head unit, then the problem is definitely with the points of connection from the head unit, OR you may have a weak battery.
The amplifier will not bring on a miswire fault in the head unit.

Kenwood Car... | Answered on Mar 30, 2020

NO KENWOOD amp model stated at all (vast there are)
wild guess speaker or wires to them shorted or open.

Kenwood Car... | Answered on Feb 29, 2020

get the manual? on it? yet?
RTM . typed the number wrong ,
kenwood KGC4300 equalizer

THAT IT/? 35 years old today, that? 1985 made !

Be nice for you to first tell what it is. how used, in car? home stereo or what?
who hard to find, the KGC4300 , DIN cable lost.
# of EQ Bands: 5 - Equalizer Features: Subwoofer Output, Fader Control
yes it has a DIN plug cable set with it , new but you lost it/
Id trash it but
the service manual is here.

the only other 2 ways to fix this is buy the cable and last find a rare schematic of this EQ. boxl.

here is the schematic.

Kenwood Car... | Answered on Feb 29, 2020

the amplifier of the tape is dead or it need service

Kenwood Car... | Answered on Feb 25, 2020

I think there is a switch to go from output 3+4 to subwoofer

Kenwood Car... | Answered on Jan 04, 2020

Your Kenwood has a component or wiring fault that has to be corrected before normal operation can resume.

Kenwood Car... | Answered on Dec 22, 2019

Make sure ground and power to the AMP are perfect (clean and tight). Afterwards unplug all the speaker wires and/or RCA speaker connections. Does the light still flash and power down after it is reset? If so, the AMP may be damaged. If not, then one of your speaker wires are shorted. Plug one speaker in at a time. One of them should cause a negative reaction.

Kenwood Car... | Answered on Dec 18, 2019

Page 13 says it is activated by the user. It tells you to treasure the code. Ask the last user. Take it to a Kenwood Service centre. Try a reset as shown on Page 3 of the manual.


Kenwood Car... | Answered on Dec 03, 2019

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