Amp getting hot

[digitalrainman 10+ year member]

What does it mean when an amp states 150x4 @ 13.8v. I know that just means the input voltage required but what if your car deviates from that. My car normally is running just over 14v on the mark, so about 14.4v i assume.

 

[dman4486 5,000+ posts]

What does it mean when an amp states 150x4 @ 13.8v. I know that just means the input voltage required but what if your car deviates from that. My car normally is running just over 14v on the mark, so about 14.4v i assume.

that is just the main voltage...if you are running 14.4 continuous, then you will put out more than 150rms

 

[digitalrainman 10+ year member]

I just remembered one thing that happened when i made some mdf baffles recently a few days ago. By mounting the speaker that 3/4 of an inch further i didnt realize my terminals touched the metal of the doorframe and when i went to turn my system on it just popped then turned off. I knew what it was immediately after doing it, and took out the speaker and wrapped the terminal in electrical tape and put it back in, all worked fine after that, but now im wondering if that could have blown a fuse and caused this heat issue.

If i was to blow a fuse wouldnt my amp not even turn on?

 

[dman4486 5,000+ posts]

I just remembered one thing that happened when i made some mdf baffles recently a few days ago. By mounting the speaker that 3/4 of an inch further i didnt realize my terminals touched the metal of the doorframe and when i went to turn my system on it just popped then turned off. I knew what it was immediately after doing it, and took out the speaker and wrapped the terminal in electrical tape and put it back in, all worked fine after that, but now im wondering if that could have blown a fuse and caused this heat issue.
If i was to blow a fuse wouldnt my amp not even turn on?

more than likely...

 

[its_bacon12 10+ year member]

if its only getting hot on one side, im assuming its the bridged side. bridging pushes the amp harder, its essentially putting out twice as much on the back 2 as it is on the front two. keep that in mind.

 

[digitalrainman 10+ year member]

Ok i just went out and measured resistance on all three speaker outputs (2 fronts, sub). The left front has 3.0ohms, the right front has -24 ohms, the sub has 8ohms. This was what was measured on a dmm with .8ohms natural resistance when you connect both pos and neg together. All these values seem weird to me and can anyone explain why they wouldnt even be near the 4ohms they should all be at?

The -24 reading has me worried. This was on the right speaker component, on this component when i first put in my rsd's i messed up and flipped the neg and pos terminals on the crossover input. I have fixed this since and is identical to my left now, but i wonder if it had any effect on why the reading is off.