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well matched setup but amp is overheating


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nfrank89 
Copper - Posts: 86
Copper spacespace
Joined: April 30, 2009
Location: Washington, United States
Posted: July 20, 2011 at 11:46 AM / IP Logged  
So it's a Rockford Fosgate Prime R500-1 500w rms @2ohm amp (2 ohm stable) and a RF P3D4-12. that's a 12in dual 4ohm voice coil P3 rated at 600watts RMS.
the sub is wired down to 2 ohms. customer is complaining about amp continuously over heating and going into protect mode. gain is set properly.
amp is mounted to the back of his box, had him turn the box side ways in his trunk to let it get more air and he said it still happens
why is the amp over heating? what can i do to help fix it
sthrnbmpn 
Copper - Posts: 70
Copper spaceThis member has made a donation to the12volt.com. Click here for more info.spacespace
Joined: March 17, 2011
Location: Tennessee, United States
Posted: July 20, 2011 at 12:30 PM / IP Logged  
voltage drop, to the back somehow?
if its not over-gained id be looking at the temp of the ground point where its grounded to the chasis,
maybe the trunk is just too hot for the amp, amp fan !!
1000 watts of lp, now need sum hp an mids
ac0j 
Copper - Posts: 121
Copper spacespace
Joined: January 27, 2006
Location: United States
Posted: July 20, 2011 at 10:34 PM / IP Logged  
I would make sure you have a good power and ground connection and monitor the voltage at the amp.
d bo 
Member - Posts: 6
Member spacespace
Joined: July 16, 2011
Location: California, United States
Posted: July 20, 2011 at 11:29 PM / IP Logged  
I have 2 RF Prime amps and they both get hot a hell bout to hook some fans up. I didnt realize that the Prime amps were maid in China  till after a bought them. ( I got a deal and now I WHY) They still make what I got set up sound great, but they do get HOT.This is my 1st post by the way.
dont hate
ac0j 
Copper - Posts: 121
Copper spacespace
Joined: January 27, 2006
Location: United States
Posted: July 20, 2011 at 11:34 PM / IP Logged  
Make sure you have enough voltage at the amps, if less than 12 volts at the amp while the system is on, check wires and altenator output.
nfrank89 
Copper - Posts: 86
Copper spacespace
Joined: April 30, 2009
Location: Washington, United States
Posted: July 21, 2011 at 12:24 AM / IP Logged  
maybe i can talk him into upgrading to the punch 500watt amp. anyways you're saying lower voltage can cause it to overheat?
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: July 21, 2011 at 2:02 AM / IP Logged  
Lower voltage means higher current(for hi power amps), and since heat is proportional to current-squared - ie, Amps x Amps, 20% more current means 40% more heat. (IE - 12V is ~20% less than 14.4V. Or more accurately, 14.4/12 = 1.2 (times the current); 1.2 x 1.2 = 1.4 (times the heat).)
d bo 
Member - Posts: 6
Member spacespace
Joined: July 16, 2011
Location: California, United States
Posted: July 21, 2011 at 5:27 PM / IP Logged  
This might sound crazy but I have a volt meter but dont  know how to use it. Can someone explain plz.
dont hate
DYohn 
Moderator - Posts: 10,741
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: April 22, 2003
Location: Arizona, United States
Posted: July 21, 2011 at 5:47 PM / IP Logged  
d bo 
Member - Posts: 6
Member spacespace
Joined: July 16, 2011
Location: California, United States
Posted: July 21, 2011 at 5:50 PM / IP Logged  
Thanks
dont hate

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