Amplifier with No Fusing?

[PhatTonyDeMarco 5,000+ posts]

Well today I got my new amp, it is a Planet Audio P-2250D. I was looking in the manual and noticed that it says its max current draw is 160A and there is no fusing at all on or inside of the amplifier. Do I need to get a 160A fuse for my power cable? Or what....?

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[PhatTonyDeMarco 5,000+ posts]

i dont have any fuses on ym 2500d either.

So what have you done, left it? Or are you adding to the question?

 

[stones 10+ year member]

Some company's require that you fuse the amplifier your self, it cuts the cost of the amplifier a little especially with very high output ones.

 

[PhatTonyDeMarco 5,000+ posts]

So fuse it via the power cable...?

 

[SSS 18734 5,000+ posts]

you'll have to get a 160 amp (or smaller) fuse and attach it to the wire that goes to your amplifier.

 

[PhatTonyDeMarco 5,000+ posts]

Okay thanks buddy.

 

[bikejunkie223 10+ year member]

Really, the fuses in the amp are redundant to the main fuse at the battery, or any fuse blocks prior to the amp. My Xtant doesn't have any fuses either, but I have a 60amp fuse 4" from the battery, and a fuse block at the kick panel, and really the fuse block at the kick is not needed except it gives an easy location to tap in my xmradio tuner and ipod controller for power.

 

[maxxguy1 10+ year member]

Fuse the power cable at 160amps. I have a autoteck mm4000.1d and it is exsternaly fused on the power cables one 200 per cable running into it.

 

[thch 10+ year member]

some amps have clamping or other circuitry that prevents the flow of current if it would be too high. kinda like a fuse that people can't change.

the battery must be fused in case the wire shorts before the amp.

 

[GSteg 10+ year member]

some amps have clamping or other circuitry that prevents the flow of current if it would be too high. kinda like a fuse that people can't change.
the battery must be fused in case the wire shorts before the amp.

x2

This guy knows what he's talking abou //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[GSteg 10+ year member]

The reason why many high-output amplifiers do not have fuses built into them is not really because of manufactoring cost. It's more for design/output than anything else.

If anyone has an amp that has fuses on it, take a look at the internal of the amp and you'll notice that the fuse will have a blade connected to the circuit board. The combination between the blade and the fuse itself will increase resistance (after all, the current has to pass through the tiny thin blade). The built-in fuse design can decrease the output voltage by 1v, which is something to cry about //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

My MB Quart Q-series (MBQ's highest line) are not cheap amps at all. Very high quality and has ample amount of power. It requires an external fuse.

 

[Incriminator 10+ year member]

The reason why many high-output amplifiers do not have fuses built into them is not really because of manufactoring cost. It's more for design/output than anything else.

Correct, believe me when your working on a 1000+ watt amp cost isn't an issue. The main reason you don't have fuses is because of lack of space on the board layout to put them because you need so many 40's to get to the right fusing. Second, anything over 3 fuses just looks horrible. That's the main two reason the 20.1 doesn't have fuses.

Can you imagine how 8 or 10 40 amp fuses would look if it would fit! //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif Not good

Nick

 

[bikejunkie223 10+ year member]

Imagine how lame it would be to change out a bank of 8 40 amp fuses?