is this safe?

[tyrefryer]

ok i just need to check if this is safe

i have a sub and my splits which were running off a 4 channel amp which fried bcos my sub cables were shorting for a while, i have not had the money to get a new amp so i am making do with what i have, which is a couple alpine v12's and a monoblock.

The only way i can see of getting good power is running the splits off the v12 4 channel and sub off the mono.
Bcos i am quite busy (lazy) is it ok to split the power cable in the boot into 2, it is 8 guage wire at the moment and i wanted to split that into 2 8 guage for each amp, the setup only gets a total off about 200Wrms power and the power cable currently has a 60amp fuse and i would be running separate 8 guage ground leads.

Is there any major issues in doing this?

Also Does anybody know where i can buy mosfet chips from cos i may try fixing my old amp cos that was a good one. iv seen them on ebay but only overseas and the ones iv seen a couple in dickies smith and jaycar but they arent the same and they dont work, i tried...worked for a few seconds then they blew up.

[bezz]

I wouldnt risk splitting an 8ga into 2 8ga cables... i would think that the current draw of the two amps combined could jump higher than 60A quite easily (when clipping maybe?)

Do it right the first time I reckon man, don't risk a fire. For two amps just to play it safe you should be running at least 4ga from the battery and splitting to 2 8ga using a fused distro block in your boot.

Try www.farnell.com.au for semiconductors etc

[holdenboy]

Yeah i agree with bezz, dont risk blowing another amp by splitting 8awg to run a 4 ch. and a mono. It should be fine to run the 4ch. so i would just do this in the meantime. The cheapest way to get some decent power cabling is to go to your local welding supply store and ask for ~20mmsq. welding flex cable. This is equivalent to around 4awg cable and then you should be able to run that straight to your monoblock. Fused within 30cm of the battery ofcourse.

This type of cable is very cheap when compared to "normal" car audio power cable, but without this extra cost, it should be around the $10/m mark and is just as good.
Thats if you are worried about the cost....or is it just the amount of effort required to run the extra power cable etc?

[Luke0011]

Considering an 8 gauge wire can run about 75 amps from a 5 metre length , there is no problem with splitting you 8 gauge wire into those two amps considering the total output of the two amps is only 200wrms. Look at your power equation Power W = I ( Current) x V ( Voltage). 75 amps (I) x V (12 volts) = 900 watts. So 200 Wrms which in peak terms is around 600 watts peak would be ideal for your 8 gauge power cable.
However if you are still not convinced then using 4 gauge is an option.