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amp overheating


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spootydlux4 
Copper - Posts: 149
Copper spacespace
Joined: October 03, 2004
Location: United States
Posted: March 15, 2005 at 5:51 PM / IP Logged  
i recently installed a second RE se 12" in my truck and now my amp is overheating. My amp is a kenwood kac-x811d. the subs are dvc 4ohms and i have them wired up in paralled for 1ohm of impedence. im using my factory charging system and 4g wire for power and ground. everything on the amp is turned down bout halfway so i could use it for one sub. The amp has a temperature readout and after about 5mins of use at a pretty loud volume it goes up to about 210 degrees Faren. Its mounted under my seat but has about 7 " of headroom, and it's at an angle so air can flow underneath. Any thoughts? by the way that amp is driaining the crap out of my battery. it was using 60 amps once and dropped my battery's voltage to about 9 volts!
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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: March 15, 2005 at 6:23 PM / IP Logged  
If your amp can handle a 1-ohm load (I didn't look it up) then perhaps your gain is too high.  How'd you set it?  Also, as system voltage drops, current draw increases.  Current makes heat, so an amp will get hotter as system voltage drops.  You need a high-output alternator to keep your voltage up.
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Asmodeus 
Silver - Posts: 393
Silver spacespace
Joined: September 02, 2004
Location: United States
Posted: March 15, 2005 at 6:27 PM / IP Logged  

First off check your ground on the amp....Make sure you scrape the paint off so its grounded to bare metal....Uprgrade your ground on the battery use at least 4Ga wire and make a connection from the batt to the frame....

Just for fun get a Multimeter and check the Impedances on the individual subs....I have seen cases where a sub will change impedance....Doesnt happen often but it happens...

If all is well after the upgraded grounds play it and see if it still heats up and drain the batt quickly....

If it still drains the batt quickly and you want to resolve it you may want to look into either a better alternator, a better Batt (Optima Yellow) Or a second batt(Probally not needed unless you are going to add more to your current setup)

This is all I can think of right now cuz I am tired..Hope this helps...

amp overheating -- posted image.
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spootydlux4 
Copper - Posts: 149
Copper spacespace
Joined: October 03, 2004
Location: United States
Posted: March 15, 2005 at 7:05 PM / IP Logged  
thanx. if i need a new alt. What size do you guys suggest.?
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