17 replies to this topic

[oliver122]

A pair of 6x9's will not draw near 1000w the RMS will be no-where near that figure. Think how small the wires to them are- they will no way be able to take 45A each! More like 4.5A each, I ignore peak power talk as it is a load of rubbish, always use RMS.

For that you can knock nearly a hundred amps off of your calculation. Gauges draw so little normally it's not worth even considering them. Dont forget wipers, tail and brake lights, they all draw a bit, though brake lights like washers etc wont be in use often so not a big issue.

well each speaker is 150w rms

so that would be 300+another 400 for the spot lights +110w for headlights

so that would be 810w to there and that's 67.5A , and thats without another 2 speakers 2x4" 90w rms each, then 2x6" subs 100w rms

so if i had them that would be

200w- subs
180w-4" speakers
300w-6x9's
400w-spotlights
110w-headlights

1190w without considering anything else so that would give me 99amps , i defently want to keep the spotlights , but probably could reduce on the 6x9's and 4" speakers

[TopCatCustom]

I take it you are using the rms ratings from the amps you will be using- not that they should be far from the speaker rating anyway?

As you said you wont be using it all at full volume anyway- if you are just turn your spots off, with a mini there are always compromises! My best friends mini indicators used to slow down and stop if he used them with his headlights on lol, dont worry too much about the battery- the alternator is what will have to do the work, just make sure you have a good battery.

[oliver122]

I take it you are using the rms ratings from the amps you will be using- not that they should be far from the speaker rating anyway?

As you said you wont be using it all at full volume anyway- if you are just turn your spots off, with a mini there are always compromises! My best friends mini indicators used to slow down and stop if he used them with his headlights on lol, dont worry too much about the battery- the alternator is what will have to do the work, just make sure you have a good battery.

i have used the rms on the speakers , well i want to install a high amp alternator like 65 amp, also a good battery , with plenty of power , for when i do want to have everything on, thats why i thought about having 2 batteries , one for leisure (audio + lights) and one just for the mini ,i.e all standard equipment + the gauges and probably my head unit- also its a 998cc , so im not that bothered about an extra batteries weight as i know it wont keep up with bigger engined car most likely