amp fuse / gain

[AquaSpirit]

I have a 350w SPLX amp, with a 500w SPLX sub, works great for ages, but when i turn off and back on, it doesnt seem to work. I check the fuse and its blown! [!] the gain is almost fully up, so should I try turn it about 1/2 way?

ps. that was the 2nd fuse, blown by the amp

Seicento Sporting 1.1 | Current Project : ICE Install

 

[Ham]

What size fuse are you using and fuse type.
i/e slow blow or fast blow.
if it is tha latter it will blow quickly as you switch on due to the sudden surge in current.

OHMS Law

And Power.

Watts= Volts x Amps

Current (Amps) (I) = Watts divided by Volts

Volts = Watts divided by Current (Amps) (I)

You have a total of 850 watts Divided by 12 Volts or 13.8 volts no load is typical.

Which =70.83 Amps. at 12 volts.

This the peak value of the fuse, the RMS value is 50.07 Amps.






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......Ham............

 

[AquaSpirit]

the fuse that came with the amp (one already inserted and one spare) is a 10amp, there is one in my power lead going into the amp, dont know the size but its green

Seicento Sporting 1.1 | Current Project : ICE Install

 

[dave]

some people in this thread have got something to say about spl-x amps, one guy near the bottom of thread says somthing about having it mounted right so it don't over heat.
https://www.fiatforum.com/forum/topic.asp?TOPIC_ID=2714

 

[AquaSpirit]

ive got it vertically mounted, it doesnt overheat, but when I pump up my choons, the next time i turn it on the fuse is dead. It could be the sudden burst perhaps, i try to turn my headunits volume down before switching off now, and it seems to be working.

Seicento Sporting 1.1 | Current Project : ICE Install

 

[Morty Mort]

Hei.

Have you connected the "amp OFF" cable from the head unit to the amp correctly? Most of the head units have an "automatically-sound-off-through-that-cable" before the head unit shut down itself and the amp. This is to prevent what you are experiencing now.

Morten.

 

[AquaSpirit]

i used a butt connector, my headunit is very dodgy so that could also be doing the damage. Thanks all the for the input

Seicento Sporting 1.1 | Current Project : ICE Install