20 Most Recent Kenwood KAC-728S Car Audio Amplifier Questions & Answers

if u lay it down where u can read it right to left it would be on the left hand side. the ground would be in the middle of the three connection points

Remove all the wires from the amp including the remote turn on wire. Once you do that, after about 30 seconds the amp will reset. Hook the power up first, then the ground then the remote. Turn the unit on and check for power WITHOUT the speakers hooked up. If you get no power by now it's a good chance that the amp is cooked. If you do get power, try hoking up your speakers first on one channel then the other channel and then bridged. If it cuts out or off when you touch the speaker wires to one channel or the other, then that channel is no good. Hope this helps.

If both subs are dual voice coil, you can wire one voice coil to other voice coil on each sub. Do this by running the ground of each coil to the ground of the other coil. Do the same for the positive. After doing this on both subs, you should have one ground and one positive per sub. Hook one up to the left channel of amp and one up to the right....This should work for you. If your amp plays for a while then goes into protection mode, then it cannot handle the ohm load.

your subs are the problem, not your amp, your wiring your subs paralelle, means dropping input ohmage, allowing your amp to over heat with minimal load, check the amp specs for running at low ohms, most hifonics amps are rated 2 ohms and higher, some however will run at 1 ohm, only on class b-a amps though.(competition) dropping ohmage will allow the amp to push more power to the voice coils, however the voice coils may not be rated for 1 ohm power, what ohmage are your coils rated at? do you have a min. of 100 amp inline fuse on your 1-0 awg wire? do you have internal fans? you can add mosfets to the amp but if you do so, you'll have to re-program your amps mother board.

That is pretty much saying that the amp's power supply is shorted or at least has a low resistance path to ground which is causing the fuses on the amp to blow. The amp has protection circuitry to prevent damage to the output stage so that is not what is causing this. Is the amp new?

Do you use the supercap (the big 1 farad capacitor)?

If not, then the current peaks to the subs could cause the amp to loose power for its own operation so it crashes down a little bit every now and then, but then it recovers when the current draw diminishes.

Also, it could be a battery problem, try to check the liquid level in each cell and add distilled water if necessary, if it doesn't help, it could be that the first cell at the positive terminal of the battery is "cooked" because of a lot of discharging / recharging (it does happen, but if your car has no problems starting then the battery is probably still good).

To see if the battery is the problem, try connecting a battery that you know is still good (you might want to borrow it from someone so you don't have to buy a new one right away).

If you do have the supercap and you're absolutely sure the battery is good, then the problem might be in the power amp itself, also check the wiring and speaker impedance, if it's significantly lower than 4 ohms (standard impedance for car audio), then the speakers just might be wired in a way that your amp doesn't support, so they're juicing the amp a bit too much and it goes into overload protection when you turn the volume way up.

It could be that the problem is somewhere else, i just mentioned a few things i would have checked.

regards

3rq8 (Triarcuate)

Check your speaker output cable and connector, they might have connected to body of car.

1. Remove all input / output cable from amp
2. Plug the power into amp.
3. if still the amp is still heating.
4. Check if any screw used to fix is not connected any part of the amp output or input point.

Deppends where it arc too, short at the case
just pops a fuse . short in side could need
new output trans ,they are screwed
to the heat sink , check output trans , and
all fuses.

You can buy replacement panel mount RCA (phono) jacks directly from your local radio shack if you have one, or on www.radioshack.com a 4 pack is less than 5 bucks, then you just have to have someone who can solder pretty well and TADA!! new plug in the amp.

the outputs should be replaced in pairs, there are 2 to 4 pairs, but you sould only need 1 pair replaced. these transistors typically range between 10 to 30 cdn each + labour, look for 1 to 1.5h to replace & test the unit after repair. check your local repair shop for their rates. good luck

Sounds like the amp is shorting somehow. You are obviously shorting out somewhere between the battery and the amp. Are you sure you grounding location is a good one? is the fuse blowing only when you turn the stereo on? Something is not hooked up correctly.

If the fuse at the battery is blowing then it's a short.

If the fuse on the amp is blowing then its probably a bad amp.

My Clarion is doing the exact same thing...and im starting to lean towards a failure in the powersupply of the unit...it just cant produce the sound.

Does the voltage at the battery drop when you connect 12v to the remote terminal?

If not, there is too much resistance in the power/ground wiring.

If the voltage drops at the battery, either the battery is weak or the amp is drawing excessive current.

Question edited for clarity. Try the ideas in the videos https://www.google.com/search?q=Kenwood+Excelon+DDX9904S+DVD+receiver+reset ..

Me radio kdc2159b is displaying the ward call,how do i remove it

To reset a Kenwood 8070 receiver without a remote, you typically need to locate the reset button on the device itself. This button is often small and recessed, so you may need a paperclip or a similar tool to press it. Consult the user manual or look for the reset button near the power or input/output ports on the receiver. Once located, press and hold the reset button for a few seconds until you see the receiver reset. Keep in mind that this process may vary slightly depending on the specific model of the Kenwood 8070 receiver.

Kenwood KDC-138 Instruction Manual [Page 18]

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My Kenwood KDC-d301 is giving me a E-4 error message ...

JustAnswer https://www.justanswer.com > car-electronics Aug 9, 2010 - Hello, The issue is most likely that the laser lens in the CD player itself is dirty, and not the disc. It may have been initially caused by a ... 1 answer · Top answer: You need the Kenwood radio keys that came with the unit to slide it out of the dash. It sounds ... Missing: 138 ‎' Show results with: 138

I have a KDC 138. It is stuck on OCER and will not reset.

JustAnswer https://www.justanswer.com > car-electronics > 5lw8u-... Sep 27, 2011 - This actually is DCER - you have a blown speaker. The radio is sensing a ground on the speaker circuit. Check that and let me know. If you leave ... 1 answer · Top answer: Thanks for stopping by: This actually is DCER - you have a blown speaker. The radio is sensing ... Missing: E- ‎' Show results with: E-

Cd Player Unit - Kenwood KDC-138/138CR Service ...

ManualsLib https://www.manualslib.com > ... > Service manual Kenwood KDC-138/138CR Manual Online: components description, Electric Unit, Switch Unit, Cd Player Unit. Controls Fm/Am Tuner, The Changer, Cd Mechanism, ...