Will i need a Capacitor or a bigger alternator

[VS5lTR]

i am about to install 2 amps one mono and 1 4 channel and there going to
be powering 2 subs and 4 speakers and a dvd head unit will it be fine on stock Vs v8 battery

[holdenboy]

Should be OK, how much power does the monoblock and 4ch. amp put out (RMS)?

You should be right if the mono is around 1000wrms and the spk. amp is around 300wrms (4x75).

Either way I would personally upgrade the earth wiring at the battery, preferably using 2awg or bigger cable. Replace the stock earth terminal to body cable, add another one going to the strut tower bolt etc. Also add one going to the engine block.

This will improve the charging system, most of the time it reduces the common problem of headlights dimming with bass notes.

I will add though its probably obvious but dont play the system at more than half volume for longer than a few minutes with the car off.

[StoneX]

You won't need either unless you have electrical problems after you've installed them.

[VS5lTR]

well 700 wat rms is the mono i think the 4 channel is 400 what rms

[holdenboy]

You should be right with that amount of power, as StoneX has said....if you have problems after youve installed it thats when you should look at upgrading things.