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Re: only one side works and know it all worked when i...
Car amps are generally fairly simple to wire you need;
Battery Positive (large wire) Ground (large wire) Remote signal (small wire) RCA In and/or Hi-level in
Then you generally have a set of screws or clips that are your speaker outputs.
To see if the problem is on the input or output side, simply switch your RCA cables and see if the audio starts coming out the other speaker.
If it does then you have an input problem and you should check to see if your RCA's are still plugged in to the head unit at the dash.
If the sound still just comes out the same side then you have an output problem and should check your speaker connections, verify that you subs are still good by switching the output wires on the amplifier, and check the wiring inside the speaker box.
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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.
from your sub connect one short piece of cable from + on one side to - on the other side using the same diameter cable as you are running to the sub from amp . this will leave you with + and - on opposite sides of speaker these will then run to the amp +to+ and - to- on the mono side of connetor which is one left + and one - right and the amp switched to bridged
Double check all of your connections. I know this same problem has happened to me and come to find our that all the problem was the fuse blew that is connected between the radio and amp. Also check you battery connection. Corrosion on the power cable will also cause it to have a bad connection.
This amp (kenwood 819) was designed for use with a sub-woofer, hence the single chanel. It will however power up 4 speakers in mono, and if they are capable of handling the amps.while robbing you of the benefits of stereo as well as left, right and fade control.Good luck...
If you still want it connected. You should purchase an amp installation kit, and review the topics and videos at this web site.
www.installdr.com Good luck...
unplug all speakers and see if it still into protect .If unit powers up normally without speakers , then hook up a temporary speaker directly to speaker out to see if you have output.If it works .Then check speaker cables and speakers for shorts.Also make sure you have good ground and main power and standy are present.
It sounds to me like you may have burnt a trace off of the bottom of the circuit board inside the amplifier. If you know how take the amplifier apart and look carefully at the traces. To be clear the traces are the lines on the bottom of the circuit board not the component side. Look carefully they can sometimes be hard to spot. If you find one solder a jumper wire across the two points. If you take the amplifier apart take care in treatment of the output transisors along the sides.