Kenwood KAC-7201 Overheating

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NHxj4x4

Copper - Posts: 52

Joined: November 30, 2003

Location: United States

Posted: April 21, 2005 at 10:44 PM / IP Logged

Guys,

I'm running a Kenwood KAC-7201 bridged to 4 ohms pushing 460watts RMS to 2 Infinity Perfect 10.1d subs in a ported box 1cu/ft per chamber. I'm wired with 4ga, going to a 1 farad cap, whewwww....

Anyway, since the temp has gotten above 60ish in NH, I'm overheating bad. I can barely get through 1 song without a shutdown. I have the amp bolted to 1" MDF that is carpeted. Should I have some sort of spacer under the amp, so there is space between it and the carpet? Maybe add a fan into the trunk (which I do not want to do)

I have't had the amp very long, and I would prefer to keep it as I do like it (up till now) Pic of my trunk layout: Kenwood KAC-7201 Overheating -- posted image.

Any suggestions would be very appeciated.

Thanks!

Todd

Lthlquicksilver

Member - Posts: 47

Joined: April 20, 2005

Location: United States

Posted: April 21, 2005 at 10:47 PM / IP Logged

Is the onboard fan on the amp working? Can you hear it?

Otherwise, try spacers (it couldn't hurt). I believe the Kenwoods disperse heat from the sides so make sure that left side of the amp isn't right up against the wall of your trunk.

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NHxj4x4

Copper - Posts: 52

Joined: November 30, 2003

Location: United States

Posted: April 21, 2005 at 10:50 PM / IP Logged

fan is spinning, although it does sound a tad weak compared to how it sounded orginally. The amp is very close to the wall of the trunk.

Lthlquicksilver

Member - Posts: 47

Joined: April 20, 2005

Location: United States

Posted: April 21, 2005 at 11:20 PM / IP Logged

THe next step I would try is to get another KAC-7201 from a shop "temporarily" and see if the fan is stronger on the new one. Once you have found this out, return the amp you just bought and figure out what you want to do from there. My shop just discontinued those amps but I still have a few left, your nearby shops may have some also. Give that a shot.

Also, try pulling the amp away from the wall a bit more.

NHxj4x4

Copper - Posts: 52

Joined: November 30, 2003

Location: United States

Posted: April 21, 2005 at 11:22 PM / IP Logged

not sure why this would have happened though, I had it last summer as well, well not summer but it was warm out at least. just frikkin annoying.

Lthlquicksilver

Member - Posts: 47

Joined: April 20, 2005

Location: United States

Posted: April 22, 2005 at 12:01 AM / IP Logged

If you had the same setup last summer, then I would lean toward the fan in the amp going out. Even if it just slowed down, the amp would be greatly affected.

lspker

Silver - Posts: 503

Joined: November 23, 2003

Location: Canada

Posted: April 22, 2005 at 10:23 PM / IP Logged

Are you sure that your wired up at four ohm?(checked with meter)Is there any chance the one of the coils is wired "out of phase". That amp should run fine in 4 ohm mono, warm, but not hot. Shouldn't shut down unless, maybe the lead wires are shorting out by exessive movement. Its hard to tell, how long is the ground wire? Also, check voltage at the amp while playing. If voltage is low, the amp will overheat and shut down.

kgerry

Platinum - Posts: 3,455

This member consistently provides reliable information

Joined: February 07, 2004

Location: Saskatchewan, Canada

Posted: April 23, 2005 at 2:11 PM / IP Logged

ahh, look at all the multi colored spaggetti........ i would suspect an impedence problem myself...if the amp is wired to see a 4 ohm load it shouldnt be shutting down thermally......

Kevin Gerry

Certified Electronics Technician

MECP First Class Installer

Owner/Installer

Classic Car Audio

since 1979

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Platinum - Posts: 5,352

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Joined: November 01, 2003

Location: Alberta, Canada

Posted: April 23, 2005 at 3:15 PM / IP Logged

Ayand tell me about the ground and the return resistance. Resistance = heat.

Top Secret, I can tell you but then my wife will kill me.

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Kenwood KAC-7201 Overheating

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