Amps with no Fuses safe?

[frzninvt 10+ year member]

The fuses in the amps typically don't react fast enough to save the amp from a short circuit anyway. Some of the finest amps ever built have no onboard fusing if that tells you anything.

If you know what the hell you are doing and install and mount things correctly then you should not have any problems whether the amp is has internal fusing or not.

You question has already answered, move along.

 

[Louisiana_CRX 5,000+ posts]

I don't really think they make automotive fuses big enough for my amps...//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[sundownz Pro Seller]

If the amp has no internal fuse that means you should fuse the amp power wire at the battery and before the amp. The inline fuse near the amp acts the same was as internal amp fuses. At least thats how I suggest doing it with my SAZ-3000D, which has no internal fuses.

 

[lilmaniac2 5,000+ posts]

we dont need no stinking fuses

 

[mightycrappy 10+ year member]

frzninvt you only have 243 posts. That's not enough for me to think you know what you're talking about.

J/K //content.invisioncic.com/y282845/emoticons/naughty.gif.94359f346c0f1259df8038d60b41863e.gif

Yeah I see quite a few more people have answered question and I was moving on thank you very much. Such nice people here. //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

But now someone is saying fuse at battery and at amp.

Not that I am going too. But just thought that was interesting. Would that slow down current or lower voltage going into amp? So because generally the increase of voltage that damages amps comes from the battery, and with the fuse at battery you fix the problem altogether?

And I understand you don't need fuses in all amps and you do need to fuse your power wire. I am simply just asking. If you don't want to answer or don't know, that fine.

Thank you for your help

//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[jmanpc 5,000+ posts]

Yeah, a fuse at the amp would protect it in the event that the power wire shorts out between the engine fuse and the amp.... like if the wire's jacket were punctured on rough metal where it goes through the firewall

.... which shouldn't be a problem if you install your power wire properly.

 

[Propimp 10+ year member]

Yeah, a fuse at the amp would protect it in the event that the power wire shorts out between the engine fuse and the amp.... like if the wire's jacket were punctured on rough metal where it goes through the firewall

.... which shouldn't be a problem if you install your power wire properly.

ummm isnt that what your fuse under the hood is for? if it grounds out on the FW. (i know not just FW)

 

[headless 10+ year member]

I fail to see the benefit of fusing a wire from the battery twice - once at the battery and once at the amplifier. Could someone explain why the second fuse would be useful and how it would provide any kind of service that the first fuse directly next to the battery would not? This seems to be totally redundant and pointless... but since the owner of a company that makes amplifiers just said this was the 'right' way, i'm really curious to hear the explanation.

 

[n2audio 5,000+ posts]

Yeah, a fuse at the amp would protect it in the event that the power wire shorts out between the engine fuse and the amp.... like if the wire's jacket were punctured on rough metal where it goes through the firewall

No it wouldn't.

Everything downstream of the short is effectively removed from the circuit.

 

[helotaxi 5,000+ posts]

You only need redundant fusing if you 1)have multiple amps and 2) they lack their own internal fusing. One or the other is not sufficient reason in and of itself to have a fuse under the hood and a fuse near the amp.

 

[BobbyDD 10+ year member]

I'm adding an extra battery in the back. I have 1 amp and it has no internal fuses. If I understand correctly I need the fuse under the hood, then one just before the second battery, and one between the second battery and the amp. Is this correct?

 

[Beerdrnkr 5,000+ posts]

I don't mean to thread jack but I was actually going to post the same type of question. Right now I have 2 amps hooked up, a 2ch. and a 4ch. I want to do a direct swap from the 2ch. to a monoblock amp I have for temporary use but the mono amp doesn't have internal fuses that I know of (mtx 1501D). Would it be ok to do this direct swap since I have a 60 amp fuse by the battery and from what I gather that's all I need. I know the fuse isn't big enough for this amp but I just want it for temporary use and don't need the full power of the amp at the moment I just want to make sure I don't blow anything up. Thanks

 

[headless 10+ year member]

Yes, bobbyDD - that is correct. You want to fuse as close as possible to ALL sources of power - if you've got 2 batteries, any wires coming from those 2 should be fused on both ends even if they're running between eachother, unless they are very close together and your wiring isn't running through the car.

Beerdrnkr, that's fine, just expect to blow it if you use the amp at full power and it needs more than 60a.

 

[Beerdrnkr 5,000+ posts]

Yes, bobbyDD - that is correct. You want to fuse as close as possible to ALL sources of power - if you've got 2 batteries, any wires coming from those 2 should be fused on both ends even if they're running between eachother, unless they are very close together and your wiring isn't running through the car.
Beerdrnkr, that's fine, just expect to blow it if you use the amp at full power and it needs more than 60a.

Cool, thanks for the help. I'll just keep the gains real low.

 

[BobbyDD 10+ year member]

Thanks headless.