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Fuse Keeps Blowing With New Rockford Fosgate 501S Amp. Any one know why?

 

New member
Username: Fosgatemonsterz

San Lorenzo, California USA

Post Number: 3
Registered: Nov-04
Hello everyone. I have recently changed AMPS. From a crappy Legacy to
a Rockford Fosgate 501s AMP. When I first wired it all up, I have
turned my car on, and the amp turned on fine. Then after about 3
seconds, the fuse under the hood blows. It was a 60A fuse. I then
tried 100A, 70A, 60A, and 50A fuse. And they all blew. I have checked
my ground and my power line from the battery. Also, from the batter to
the fuse holder under my hood is less then 8 Inches. Approximately 4
inches actually. Is there anything that I am doing wrong? In the
rockford fosgate book it says the the fuse from the battery should be
less then 18 inches. Does anyone out there know what is happening. Is
it the amp or my wiring. Thanks so much. God Bless you! :-)

Brett Davis

P.S. I am using all 8 gauge. All 8 gauge wiring. I am thinking about using 4 gauge all the way to the backseat, where the amp is, then then use a distributive block and put it into 8 and hook it up to the AMP. I have check both cables, positive and negitive for nicks. None at all. I ever tried it with the wires not even tucked under. Still got the same results.
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 5405
Registered: Dec-03
125 watts RMS x 2 at 4 ohms
250 watts RMS x 2 at 2 ohms
500 watts RMS x 1 at 4 ohms in bridged mode
Stereo or bridged mono output
4-ohm stable in bridged mode
Tri-Way capable
Continuously variable 50-250 Hz high-pass/low-pass (12 dB/octave) crossovers
MOSFET power supply and output devices
MEHSA mounting technology increases the heat transfer from the MOSFET output devices to the heat sink, for higher power output, lower operating temperatures, and greater reliability
TOPAZ - noise-killing differential inputs that eliminate 80% of ground loop noise
Trans,ana circuitry keeps preamp voltages low and signal paths simple for outstanding audio quality
NOMAD - advanced protection circuitry for "intelligent" shutdown protection
Wired remote included for fingertip control of Punch Bass (0-18 dB boost at 45 Hz)
Speaker- and preamp-level inputs
12-1/16"W x 2-3/8"H x 9-7/8"


a 500 watt class AB amp should require a 60A fuse.
If 60A or larger is blowing, your amp has a dead short somewhere. It may be defective.
Did you buy this product new?
 

New member
Username: Fosgatemonsterz

San Lorenzo, California USA

Post Number: 6
Registered: Nov-04
Yes. I am taking it in to my local Car Audio Depot store tomorrow. They are an authorized Rockford Fosgate seller. For now, here is a picture I just took of the blown fuses.Upload
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 5414
Registered: Dec-03
hehe nice labeling job there
 

New member
Username: Fosgatemonsterz

San Lorenzo, California USA

Post Number: 8
Registered: Nov-04
Haha. I can count! :-D
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 5425
Registered: Dec-03
no, I was serious. That's a nice image to show the fuse sizes and such heh most people don't bother.
Anyway let us know what happens when ya take the amp back. I'm curious to find out the problem.
It's a dead short somewhere.. in the amp or outside of it.
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