KAC 9152D amp goes into protect

I have been adjusting gain, boost and volume control and it still cuts out when the speakers are driven clean, no audible pops, distortion or bottoming out...   It sounds real good all the way up until I get nothing

While that may be possible, the more likely scenario is the tires would cause you to lose control of the car before they ever blow out. The engine, transmission, suspension, tires, etc. all work together as a system and any one of them could be damaged if not the entire vehicle (system). The point of my analogy is the amplifier will continue to produce the same amount of power regardless of what the speakers are rated to handle just as the car will still go faster than the tires are rated to go.

the12volt • Support the12volt.com

If the amplifier is not clipping when it shuts down, the first thing I would suspect is a poor connection with either the ground or power, however I would not rule out the PAC line amplifier you have as the culprit either. After you verify your power and ground connections and have also verified that you have sufficient operating current at the amplifier when it cuts out, do as stevdart suggested and remove the PAC piece to eliminate it as the cause of your problem. If all else is good and you have set the gain properly and killed the bass boost all together and it still cuts out, then I would suspect a bad amplifier.

One other possible scenario is the woofers are presenting a lower imepdance at certain frequencies to the amplifier than amplifier can handle. To understand this you need to know that impedance is relative to frequency and just because a speaker has a 4 ohm nominal impedance does not mean the speaker maintains a 4 ohm impedance at all frequencies. So, one last thing to try if everything else has failed to reslove your problem is wiring one woofer to each channel of the amplifier instead of both to it's bridged outputs.

the12volt • Support the12volt.com

It is a MONO block amp with two pairs of speaker terminals. Would the gain being set too high clip the amp? I would think it would just reach max power faster.

I know my ground and power are good... they work fine for the Cap. I also have a PAC OEM interface part for turning the class II data bus signal into a usable audio signal. Would that have anything to do with my problem.

Everything worked fine for my previous amplifier...

It plays fine with the engine off though. Of course I don't turn it up but without the Alt charging the battery the volts would drop below twelve quite fast.

well if you crank it im sure theyll shut off, cause mine sure does