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Amp Getting Hot and Going Into Protection


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Nuffstylez 
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Location: United States
Posted: August 23, 2009 at 1:54 PM / IP Logged  

This is my setup.  I have a 12inch solobaric L7 powered by a 1200.1 kicker amp.  I also have a 650.4 kicker amp (4 channel) powering kappa perfect component 6.1 in the front and kappa perfect 6x9's in the back.  Have 1/0 gauge wire (power and ground)  also high output alternator. Also a optima blue top.  Ground is good (real close to 0 ohms).  Here's the problem.  When I'm bumping the music (in the park), the bass amp works perfect but the 4 channel amp would get hot and go into protection for a few seconds then come back on and does the same thing over and over.  Bass amp just gets warm but the other amp gets real hot.  To troubleshoot, i disconnected the sub and blasted the 4 channel amp, it didn't get too hot and didn't go into protection.  Someone told me that if the amp isn't getting enough volts that it would overheat and go into protection, figuring that the bass amp is stealing most of the power and the 4ch amp isn't getting enough. Please help.  Also the power wire from the battery is going into a fused distribution box which is then going to the amp.  Hope I gave enough info.

jeffchilcott 
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Posted: August 23, 2009 at 4:15 PM / IP Logged  
what type of car?    Is it the factory alt?    What size optima battery do you have?
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forbidden 
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Posted: August 23, 2009 at 5:05 PM / IP Logged  

If the vehicle is not running or the ingine is idling, your alternator is not keeping up with the demand placed on the electrical system. As voltage drops, current spikes so that the amp can try and make power still. This is making the amp work really hard. That hard work = heat. Go driving for awhile and post the results while the vehicle is in motion to see if it still happens.

Top Secret, I can tell you but then my wife will kill me.
Nuffstylez 
Copper - Posts: 58
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Posted: August 24, 2009 at 12:13 PM / IP Logged  
Sorry, its a 2000 accord V6 4 door sedan, and the alternator is a 200amp high output alternator (replaced factory after it died on my) and the optima battery I have is a 34/78 series blue top.  Also I did drive the car around on the highway and the same thing happened, it cut off on me and was real hot.  I don't know what it could be.  Also this is the second amp that did this.  I had another kicker 650.4 amp that overheated and I thought it was the amp, so I exchanged it, but the same thing is happening to this one too, so I know its not the amp
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Location: Alberta, Canada
Posted: August 24, 2009 at 12:40 PM / IP Logged  

It probably is the amp. Heat is a natural byproduct of the production of power. You put the amp in a trunk that is not vented. You use the amp for a extended period of time. You run the amp at full output. It is summer time (excess heat in the vehicle). All these things couple together to make a amp go into thermal protection. If the amp is getting that hot and going thermal on you, chances are it is the amp. Start by disconnecting one set of speakers from the amp and retest again. Look to a full range class D amp like the Eclipse XA4200 would be my suggestion.

Top Secret, I can tell you but then my wife will kill me.
remarkable53 
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Joined: January 25, 2006
Location: United States
Posted: August 27, 2009 at 4:05 PM / IP Logged  
  If I'm not mistaken isn't your Kappa Perfect Componets' impedance rated @ 2ohms?  As well as the Kappa 6x9s?  Infinity does that now and that could make your amp run really hot.  I'm just saying....
remarkable53
Nuffstylez 
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Posted: August 27, 2009 at 10:21 PM / IP Logged  
Ur right about the impedance, the components are rated 4 ohms but the 6x9s are rated at 2 ohms.  Don't know how I could of missed that!!  But now the thing is, the amp is able to play at two ohms.  Did I connect the wiring wrong??  I connected it straight, positive and negative to the positive and negative of one channel and the same thing to the other for the other speaker or is there a special way to hook them up?
ianedward1 
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Joined: October 23, 2008
Location: Georgia, United States
Posted: August 28, 2009 at 4:40 PM / IP Logged  

There probably isn't anything wrong with how you hooked the speakers up. The amp is probably just going to get hot running at a 2-ohm load. The specs say that it can play at 2-ohms but they don't mention for how long. That is often the case with many amps unfortunately. I would reccomend the new Kenwood Class-D 4 Channel

Head Unit - Pioneer P80MP
Sub - 1 10" Soundstream T-5
Amps - 1 Kicker KX400.1, 1 Legacy crap 2 channel
Door Speakers - Audiobahn 600V Components
Box - Custom by Southern Sound in Statesboro, GA
i am an idiot 
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Posted: August 28, 2009 at 5:27 PM / IP Logged  

Have you tried playing the system with the trunk open to keep the woofers from beating the 6X9s to death?  Does it still heat up?

Nuffstylez 
Copper - Posts: 58
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Posted: September 01, 2009 at 9:08 PM / IP Logged  
I actually got around to looking at the specs of the 6x9's and they are actually rated at 4ohms, the new one's out for 09 are rated at two ohms.  So the impedance isn't the problem.  I just borrowed another amp from a friend and will try this one and post my findings, I am so hoping it's the amp and nothing else.  And yes "i am an idiot", I did try playing the system with the trunk open, and it's still the same thing. Most of the time I usually blast the music when I'm at the park chillen, and the trunk is open.

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