Amplifier fuse blows

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jnuts247

Member - Posts: 31

Joined: January 21, 2005

Location: United States

Posted: October 27, 2005 at 7:24 PM / IP Logged

i just installed 2 12" subs with a 1000 watt amp, and everything seems to work fine for a little bit and then all of a sudden the fuse will blow?? i put in a bigger fuse and it still blows?? any ideas please help need answers asap!!!

DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: October 27, 2005 at 8:11 PM / IP Logged

What fuse? In the amp or in the power cable someplace?

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geepherder

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Joined: October 27, 2003

Posted: October 27, 2005 at 9:39 PM / IP Logged

Yes, tell us you're equipment, and explain under what conditions, if known, the fuse (which fuse) blows.

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jnuts247

Member - Posts: 31

Joined: January 21, 2005

Location: United States

Posted: October 28, 2005 at 9:03 PM / IP Logged

i am running 2 12" phoenix Gold Octane R Subs with a 1000 Watt 2 Channel Lagacy amplifier, the fuse in the amplifier is the one that keeps blowing but only when the volume is turned up pretty high, about 26 on a kenwood head unit... it is a 30a fuse the amp calls for a 15a so i tried that it blew out with the volume only at like 5 so i went to a 20a and then a 25a and they did the same thing just keep blowing out at low volume??? any ideas thanks for the help

arrow12

Silver - Posts: 527

Joined: October 06, 2005

Location: United States

Posted: October 28, 2005 at 9:44 PM / IP Logged

Your fuse probably isn't big enough. Is there one or multiple fuses? The amp may also be defective.

That's my opinion. Take it, leave it, or correct me.

stang351w

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Joined: August 20, 2003

Location: Canada

Posted: October 28, 2005 at 9:59 PM / IP Logged

i'm not really sure on those amps or subs but one thing i noticed you didn't mention is how are they wired? are they 4 ohm stereo or 2 ohm mono? maybe even lower then 2 ohm mono?

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geepherder

Platinum - Posts: 3,668

Joined: October 27, 2003

Posted: October 28, 2005 at 10:20 PM / IP Logged

Something is not adding up. You say your 1000 watt amp only calls for a 15 amp fuse? Even if we assume your amp is 100% efficient, and divide the 1000 watts by 14.4 volts (car running), we are pulling almost 70 amps. This must be the peak rating of the amp. Legacy is not the most trustworthy brand, and is good at inflating they're numbers. What is the RMS rating?

How are your subs wired, and what are the impedences (ohms)?

My ex once told me I have a perfect face for radio.

Alpine Guy

Platinum - Posts: 2,478

Joined: October 18, 2003

Location: Canada

Posted: October 28, 2005 at 10:40 PM / IP Logged

If your lucky your amp will put out 200 watts To me it sounds like you amp is either toast, or you have a grounding issue. Is your gain cranked? if so, turn it down, do a search on how to adjust it.

2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.

pimpincavy

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Joined: May 20, 2004

Location: United States

Posted: October 28, 2005 at 10:45 PM / IP Logged

FYI: Its not usually a good idea to replace a blown fuse with a larger fuse.

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Amplifier fuse blows

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