Sometimes, a VERY brief drop in voltage (too short to be seen on a standard multimeter) will cause the amp to shut down for a short while. The input op-amp is generally very near the RCA jacks like THIS. But as soon as I plug in 1 RCA cable it goes into protection. If they are connected loosely, it can cause the amplifier to see it as a major problem, so it will purposely put itself stuck into protect mode. New member. Amp Going Into Protect Mode? Now my amp goes into protect mode. . I installed my amp with the rockford 4 gauged amp kit. The resistance across fuses rated more than a few amps will be essentially 0 ohms. 2. I need help If you're using a mono amp and have only one pair of speaker wires, you'll need to disconnect all but one speaker from the other end of the speaker wires. im only asking cause i have sean some people that have run speaker wire as there ground. If your amp is working properly, pay attention the way the indicators light up when powering the amp up. It is a much more powerful amp than the sub, the amp is 850w rms while the sub has a tolerance of 600w I thought setting the gain all the way down would allow it to be used with it. If that red light comes on, stay calm, power off your amp, and check your speaker connections and impedance ratings, making any necessary adjustments. If it doesn't go into protect, reconnect one pair of speaker wires at a time. The amp then worked for for some periods before shutting off. Number1 Diamond Member. You did not tell us if you got out of the protect mode or if you need help with that. If the amp powers up after disconnecting the speaker and signal cables from it, try reconnecting the RCA cables. Heads, Subs, EQs, etc... Bring it into our show room. If you’re working on a car amp, simply remove the red wire on its back end. If you place it on a chassis ground point in the vehicle and there is a bad connection between the amplifier ground terminal and the chassis ground, it will appear that the amplifier has sufficient voltage at the B+ and remote terminals (assuming that the feeds to those are intact). To know how low your meter reads at 0 ohms, touch the leads together for 5 seconds. The amp started to go into protection as i was setting the gains,i thought maybe the amp was detecting clipping that i could not hear so i decided to turn the gains down a bit. I installed a new head unit, swapped RCA cables, made sure the connections are good, made sure my voltage was good, and tried different media sources; it's still going into protect mode. Using the demo should help you to better understand where you'd lose voltage when there is a break in the circuit. The BX250 and many other amplifiers use the same solid red light to indicate both that the signal is muted and that the amp is in protection mode. 04-05-2008 #1 spikey007. In most of the budget amplifiers, the shield will be directly connected to the NON-bridging speaker terminals. Crossovers/Filters: Not all op-amps are in flat packages. If you're using a mono amp and have only one pair of speaker wires, you'll need to disconnect all but one speaker from the other end of the speaker wires. Solution: This can be caused by too low of an impedance from the way the speakers are wired, and sometimes a poor charging system (if the amp goes into protect when the volume is turned up). Press J to jump to the feed. for some reason my fosgate 1500bd amp keeps going into protect mode like 5 secs. I'm not to well versed in large power amps like these but I have some background knowledge from my ece classes. With your multimeter set to DC volts, the black meter probe on the ground terminal of the amp (not on the point where the ground wire connected to the vehicle) and the head unit on (so the amp will have remote voltage applied), touch the red probe alternately to the B+ (battery +) and remote terminals of the amp. Now it wont work and keeps turning on and going to protection mode. Or if its something much harder to fix. I then figured out how to reset the amp. Occasionally, it will go into protect for 30 seconds, kick back on for a second and hit one note, and then go right back into protect. It's weird I have a cd and all the songs paly just fine at any normal volume and this one song instantly kicks my amp into Protection Mode. Blaine Drury. All my wiring is solid and ground looks good. If there's a question, pull the fuse from the holder and measure the resistance across it (set meter to ohms). The model # is XM 554ZR. This means that they can no longer function properly and will continue to overheat. Amp goes into protect mode!! PROTECTOR as soon as I turn it on. I have 2 subs bridged into my amp, i just got a different car and they are not as loud in this car as my other car for some reason and the amp goes into protect mode when i am driving. You need to check the voltage on BOTH sides of each connector and fuse holder. If you find that one pair of speaker wires or one speaker causes the amp to go into protect, disconnect all speakers from the other end of the wires and separate the wires so they can't touch. Watch as Allyn goes through some troubleshooting processes that you can try when your amplifier isn't functioning properly. Not many amplifiers will illuminate the protection light when the fuses are blown but a few will so you need to check this. I dont know what the problem is? It's helpful to know how the amplifier behaves when working properly. One of the more confusing car stereo problems can be when an amplifier goes into protection mode. If you can identify them try measuring them with a ohm meter. Generally, the power light is green or blue and the protect light is red but on some amps, the protect light is green and the power light is … The following demo is from the Installation Primer page of my Basic Car Audio Electronics site. Tried the disconnect/reconnect of all internal connectors. One minute it's working and the next minute it's not, usually with the green power LED on the amp turning to red or orange. In audio, when an amp or speaker is damaged, it's often referred to as 'blown up', 'puked', 'launched', 'toasted', or some other description. Eqs, etc... Bring it into our show room how low meter... I found that the block melted the solder and pulled out of the more confusing stereo... ) connec-tions ), the amplifier ) amp then worked for for some reason my 1500bd... 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