Question about Kenwood KAC-9102D Car Audio Amplifier

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Amp goes into protection

I have the kac-9102d wired at 4 ohms to 2 apline type r 12" subs. WHen i first hooked everything up the system played fine getting complaints from all the neighbors. The very next day im driving down the road with it cranked as normal and all a sudden the bass cuts out. The amp is going into protection, I have a good ground and none of the speaker wires are grounding out. Im only runnning and 8 gauge wire to the battery so my only thought is to change it out for a 4 gauge and add a capacitor because it doesnt seem to be getting enough power. At the start of a note the bass hits strong but gets weak and cuts off at the end? Any advice?

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  • Kenwood Master
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First change the wire,and disconnect the subwoofers to check if the amplifier turn on without going in to protection mode,if the amplifier go to protection mode you gotta change the Audio amplifiers IC's because they are in short circuit.And if don't go in to protection put one speaker at a time to check if one of them are damaged.Good luck.

Posted on Jun 02, 2008

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1 Answer

How do I wire two subs up for the full 850 rms on a kac-9102d amp



  • Wire up two 4 Ohm subs in parallel (bridged) or one 2 Ohm sub.

  • You will take both of your subs positive leads and run them to the left positive (white connector on the amp) and both of your subs negative leads and run them both to the right negative (gray and black connector on the amp). That's max RMS right there. Pay attention to the Ohm rating of your subs as this does play a factor. What I explained is how to bridge two 4 Ohm subs. 8 Ohm is a little different but car subs rarely are 8 Ohm.

  • If you have any comments please feel free to leave them here.
  • Hope this helps and thank you for using FixYa.

Regards, Tony

Sep 27, 2011 | Kenwood KAC-9102D Car Audio Amplifier

1 Answer

The subs aren't pushing out bass.


Hello crobins2,

The Kenwood KAC-6202 2-channel is only rated for 60 watts RMS per channel into a 4 ohm load. That just isn't much power for a pair of 12" subs. Even the bridged output is only 200 watts into 4 ohms, still at the low end for a sub, much less to share between a pair of subs.

Assuming that your subs are 4 ohm, you could probably get more sound by driving just one of them on the bridged terminals. But to get the best power with what you have, connect one sub to each channel, set the filter switch to the far right (LPF), set the operation switch to stereo (both channels driven), set the filter frequency (Hz) to 100 or lower, and adjust the input sensitivity as far clockwise as possible without causing distortion.

But, to do the subs justice, you really need at least 300-400 watts to share between them.

Hope this helps.

Sep 27, 2009 | Kenwood KAC-6202 Car Audio Amplifier

1 Answer

Why does the kenwood kac-9103d has two sets of terminals if its a one channel amp so how do i hook up a dual 12 phoniex gold 1200 watt sub to it


Hello damasogrizzl,

The 2 sets of terminals are connected internally. Having 2 sets just makes it more convenient when wiring multiple subs. The amp is rated for 900 watts RMS into a 2 ohm load. The specs claim that it is stable at 1 ohm but does not give a power rating.

The Radial SD competition series from Phoenix Gold are rated to handle up to 600 watts RMS. If you have the model RSdC124 with dual 4 ohm voice coils, it would be best to wire the voice coils in parallel for a 2 ohm load and connect the sub to one set of terminals on the amp. If your sub is the model RSdC122 with dual 2 ohm voice coils, you should wire the voice coils is series for a 4 ohm load and connect the sug to one set of terminals on the amp. Wiring the voice coils in parallel will result in a 1 ohm load. And, while the amp may be stable at 1 ohm, the sub will be seriously overpowered.

Hope this helps.

Sep 23, 2009 | Kenwood KAC-9103D Car Audio Amplifier

1 Answer

Wiring options


Yor best bet is to wire each one positive to neg to get 8ohms then pos-pos and neg-neg to get 2.66 ohms. Otherwise series parallel. If you wire them all pos-pos and neg-neg you will be running .66ohms and will most certainly fry your amp or it will overheat and shut down all the time

Sep 07, 2009 | Kenwood KAC-9102D Car Audio Amplifier

1 Answer

Amp goes dirctly into protect


ok well it could be two thing wrong your amp dont have a good ground or your amp is a smar amp and your subs must have to be hooked up so the power from the amp cn go to the subs so the amp can see that you do have subs hooked up to take it out of protect o and look at your fuses to to smal or to big will send it to protect to

May 19, 2009 | Kenwood KAC-9102D Car Audio Amplifier

1 Answer

To bridge a Kenwood KAC-9102D


Hello laurogleal,

The Kenwood KAC-9102D is a mono amp. There is no bridging. Having two sets of terminals is just a more convenient way of connecting two subwoofers. The amp is stable down to 2 ohms impedance, so it is safe to run 2 4 ohm loads in parallel.

Hope this helps.

Apr 28, 2009 | Kenwood KAC-9102D Car Audio Amplifier

2 Answers

1 amp cuts off


i had this same prob. & i run 2 amps as well, cameto find out i had a neg. & positive touching , so check all ur wiring for tht amp..

Apr 01, 2009 | Kenwood KAC-9102D Car Audio Amplifier

3 Answers

KAC-9102d no sound, Amp powers on but no sound to the subs.


If the sub isn't working, you won't get a pop. All you need is a small speaker. Don't need a sub, you just want to test the sound. I recently blew 2 subs, no smoke, no smell, no sign of being blown. Absolutely nothing from the subs.... In the past my sub locked up. You can take your sub out of the box and hook the + and - to the battery to see if you can get the sub to pop there. I believe a small box will push a sub into a deep excursion to the center of the cone. I have 2 lanzar VW12D's that just quit. I hooked a 6 x 9 up to my amp and low and behold I had sound! Try that and see what you get...

Feb 07, 2009 | Kenwood KAC-9102D Car Audio Amplifier

2 Answers

Would this work


Yes, that amp works great with the CVRs as long as they are 12" subs and you get 2-dual 2-ohm subs. I started off with the same setup and it pounds HARD!!

Jan 29, 2008 | Kenwood KAC-9102D Car Audio Amplifier

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