Amps getting hot recently

[snfsh79077 10+ year member]

I have a mm75.4 bridged on my cdt's pushing about 150rms. When I upgraded my wire to 0 gauge from battery to a distro splitting into 4 gauge for the amps I forgot the ground wires terminal ring for my high amp back at school so I left the 8g ground. A week ago I upgraded that ground to 4g. I havent driven the truck much since Ive been at my parents but I took it out last night to run to mobile for a concert (an hour drive). Well on long drives I play my music fairly loud. I had the deck at 50/80 which I usually keep it around 50-60/80. well 45 min into the drive the highs cut out so I turned everything off. Went to the show and when I was leaving I turned everything back on and it was working so I figured the amp must've gotten hot and shut off. On the way home I kept it around 45-48/80 and it did fine but when I got home I went and touched the amp and it was way to hot.

Long story short would a bad ground cause my amp to get hot or am I looking at another problem?

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[mendon mafia 10+ year member]

amps just get hot. they produce a lot of heat as a byproduct of power

 

[KyleBechtold 5,000+ posts]

I have a mm75.4 bridged on my cdt's pushing about 150rms. When I upgraded my wire to 0 gauge from battery to a distro splitting into 4 gauge for the amps I forgot the ground wires terminal ring for my high amp back at school so I left the 8g ground. A week ago I upgraded that ground to 4g. I havent driven the truck much since Ive been at my parents but I took it out last night to run to mobile for a concert (an hour drive). Well on long drives I play my music fairly loud. I had the deck at 50/80 which I usually keep it around 50-60/80. well 45 min into the drive the highs cut out so I turned everything off. Went to the show and when I was leaving I turned everything back on and it was working so I figured the amp must've gotten hot and shut off. On the way home I kept it around 45-48/80 and it did fine but when I got home I went and touched the amp and it was way to hot.
Long story short would a bad ground cause my amp to get hot or am I looking at another problem?

where is the amp at? there wasn't anything on it preventing circulation? a shirt or anything? how good is the ground.. it is possible..

 

[snfsh79077 10+ year member]

where is the amp at? there wasn't anything on it preventing circulation? a shirt or anything? how good is the ground.. it is possible..

I did forget to mention that the amp is under the seat on the passenger side. My bag was sitting on the floor which causes a lot of restriction on air circulation but it always sit there on the rides to and from school so I wasnt quite sure about it.

The ground is actually not as tight as Id like it to be so I had planned to find a way to get it tighter. It was decently tight when I installed it but theres a possibility it loosened up, Ill have to check it.

As to the other guy I know amps produce heat from power...I've had this amp long enough to know that it doesnt usually do this. It had never cut off until changed the ground which makes me think thats the reason.

 

[snfsh79077 10+ year member]

up

 

[Louisiana_CRX 5,000+ posts]

maybe add a cooling fan and double check all the connections especially the grounds

 

[snfsh79077 10+ year member]

maybe add a cooling fan and double check all the connections especially the grounds

I was thinking about adding a fan. Im leaving for baton rouge tomorrow so I was going to try and redo that ground before leaving, hopefully itll fix the problem.

 

[Elton 10+ year member]

my amp is on the floor too so i cut some little wood spacers for it too get air under it too

 

[snfsh79077 10+ year member]

my amp is on the floor too so i cut some little wood spacers for it too get air under it too

well what Im confused about is until now the amp has never been hotter than luke warm. My sub amp stays cold

 

[SPL Blazer 10+ year member]

Double check your ground, you might need to move the ground or clean it up, sounds like your amp isn't grounded well enough. You say that this problem happened when you upgraded your wire, so the only change was the wire. This would lead me to believe this is also the problem. Double check your grounds.

 

[MmatsDude 10+ year member]

my memphis 4 channel got hot too after bumping for about 40 minutes loud, i un-bridged it and never got hot anymore lol

 

[SPL Blazer 10+ year member]

Amps almost always run hotter when you drop the ohm load, it's forcing the amp to work harder. Same thing used to happen on my RF 1501bd, was fine at 4 ohms and get's too hot on 2 ohms after 45 minutes.

 

[snfsh79077 10+ year member]

amps bridged at 4 ohms with a constant 14.0-14.1 volts. I grounded in the same place the previous ground was at but Im going to check it tomorrow to see.

 

[loopkiller 10+ year member]

How was your voltage at the time? If you are running into problems after a long run time, your battery might be drained. That would lead to lower voltage and higher amperage. Higher amperage leads to hotter components and protect mode cutoffs.

 

[SPL Blazer 10+ year member]

How was your voltage at the time? If you are running into problems after a long run time, your battery might be drained.

???? How would his battery be drained if this happened while he was driving? I think you might want to hold off on giving advice.