Wiring fuse in between amp and subs?

[cichlid_baby 10+ year member]

Yes, it will serve the exact same purpose as an internal fuse.

Somehow... this is not the same info that I received from the members here when I asked somewhat the same question..

see link

http://www.caraudio.com/forum/showthread.php?t=430778

I was told that the inline fuses where there to protect the wires and not necessarily to protect the internals of the amp.

Now we are all confused.

 

[bass_lover1 10+ year member]

the fuse for the amp goes between the power source and the amp....there will never be a fuse between the amp and subs. the internal fuses serve the same purpose as the main fuse.

No they don't.

The main fuse by the battery ONLY protects the wire it's run inline with, that's it. It's main purpose is to prevent fire in case of a short.

Internal fuses on an amp are there to protect the amp. If they served the same purpose, then you're willing to run a power wire with no fuse, as long as the amp is internally fused? I wouldn't think you would but hey ya never know.

 

[headless 10+ year member]

bass lover has it basically right. Fuse the wire as close to the source of power (battery) as possible, to protect the wire from shorting out, melting it's insulation, and burning your car down.

Fusing for the amp is done as close as possible to the amplifier itself (usually internally). If the amp is rated @ 200a, and your wire is also rated @ 200a, then 1 200a fuse inline on your power wire, as close to the battery as possible, will do the job for both the wire AND your amp. In THAT case, it'd serve the same purpose - and if you want to, you could fuse your wire much lower than it's rated for, which would result in the same situation.

For example:

1/0Gauge wire, amp max 100amps.

Obviously, 1/0 ga can handle well over 100a. So you'd fuse the 1/0 for it's maximum - then your amp would need a 100a fuse too, to protect it.

You COULD just put a 100a fuse on the 1/0GA wire, then the same fuse protects the wire AND the amp....as long as that 1/0ga wire isn't used for other amps, that works fine...but if you split that 1/0 to 2 amps, and each needs 100amp max for themselves... now you need to fuse separately the wire itself at it's maximum rating - then fuse each again after they split to the amps at the amplifiers' 100a ratings. You can see how people can get confused about whether or not they serve the same purpose...they can, in some cases. Most of the time you have 2 amps run on 1 large wire run - and THAT's where people get the idea that they are different - because in that case, they are; the large wire needs it's own fusing, and then the 2 amps need their own. If you only ran your wire for a single amp, then the same fuse can protect the wire and the amp.

 

[jon_k 10+ year member]

I'd be weary though, wouldn't he blow his subs if he doesn't have a fuse between amp and subs

?//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

 

[headless 10+ year member]

I've never seen a fuse placed on speaker wires before, and don't see any reason to. The only possible reason you'd do that is if you expect your speaker wires to get shorted out some time... and any decent amplifier has automatic short circuit protection that can take care of the extremely unlikely event that somehow my speaker wires short against my ground...and you do NOT need to fuse your speaker wires to avoid blowing your speakers. I mean really, dude, where did you come up with this shit?

 

[JimJ 5,000+ posts]

Magnepans have a fuse in between the inputs and the panels. About the only other time I've seen it done.

 

[silvercookie 5,000+ posts]

are you sure your name is jimaaaaaay and not timaaaaay

 

[Lonnie 10+ year member]

Meh yea ive noticed that some amps have internal fuses and some dont. I personally have a 100 amp fuse 8-10 inches from my + battery. Supposedly the closest to the battery you can have it the more effective it is and absolute max is like 2 feet. Guess it really just depends on where you can mount it. I have my fuse on my passenger side shock housing thingy. Was a pain in the *** to drill screws through the metal...but yea whatever lol.

 

[headless 10+ year member]

Please tell me you didn't drill into your shock towers to mount your fuse.

 

[dman4486 5,000+ posts]

No they don't.
The main fuse by the battery ONLY protects the wire it's run inline with, that's it. It's main purpose is to prevent fire in case of a short.

Internal fuses on an amp are there to protect the amp. If they served the same purpose, then you're willing to run a power wire with no fuse, as long as the amp is internally fused? I wouldn't think you would but hey ya never know.

you missed my point....the internal fuses are not on the output side.

 

[dman4486 5,000+ posts]

I'd be weary though, wouldn't he blow his subs if he doesn't have a fuse between amp and subs?//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

only if the amp puts out more power than the subs can handle