how much power is enough ?

[kmalinich]

I have a feeling this is way over the OP's head.

OP - What do you have in your vehicle right now?

[MAXSPL_153]

I have a feeling this is way over the OP's head.

OP - What do you have in your vehicle right now?

4-SS xxx6500's sitting on a temp. amp rack & about 60% of the wall complete no subs,wiring,head unit or any other electronics . thats why i posted this its my next step on the build and i didnt know exactly how much power i needed to back my amps

[Boon]

XXX6500's don't even make 4kw on 12v. Maybe close to 4kw at 14.4v, the ratings on them are bulk lies.

I'd allow for 16kw of output, maybe 75 % efficiency plus some highs amps so I would be budgeting for 22kw worth of dc current.

So roughly 1500A @ 14.4v but that's just ridiculous.

Realistic musical current draw is between 25 and 50% of total, so you're looking at 375-750A sustained.

If you want to bang on it for hours on end, try for 500+A of alternator and 400+ Amp Hours of battery.

2x 250A alts and 5 D3100's would keep it going all day every day, IMO.

[EclipseChris]

XXX6500's don't even make 4kw on 12v. Maybe close to 4kw at 14.4v, the ratings on them are bulk lies.

I'd allow for 16kw of output, maybe 75 % efficiency plus some highs amps so I would be budgeting for 22kw worth of dc current.

So roughly 1500A @ 14.4v but that's just ridiculous.

Realistic musical current draw is between 25 and 50% of total, so you're looking at 375-750A sustained.

If you want to bang on it for hours on end, try for 500+A of alternator and 400+ Amp Hours of battery.

2x 250A alts and 5 D3100's would keep it going all day every day, IMO.

OP YOU LISTEN TO THINS MAN... LISTEN TO HIM!!!

[MAXSPL_153]

XXX6500's don't even make 4kw on 12v. Maybe close to 4kw at 14.4v, the ratings on them are bulk lies.

I'd allow for 16kw of output, maybe 75 % efficiency plus some highs amps so I would be budgeting for 22kw worth of dc current.

So roughly 1500A @ 14.4v but that's just ridiculous.

Realistic musical current draw is between 25 and 50% of total, so you're looking at 375-750A sustained.

If you want to bang on it for hours on end, try for 500+A of alternator and 400+ Amp Hours of battery.

2x 250A alts and 5 D3100's would keep it going all day every day, IMO.

thank you so much for gettin right to the point .. thats what i needed. it wont be pounded on for hours at a time but maybe 1-2 hrs at half volume with maybe a burb somewhere in there to let my presence be known . thanks again man . i appreciate it ! on the hunt for some POWER

[Spitfire2k6]

XXX6500's don't even make 4kw on 12v. Maybe close to 4kw at 14.4v, the ratings on them are bulk lies.

I'd allow for 16kw of output, maybe 75 % efficiency plus some highs amps so I would be budgeting for 22kw worth of dc current.

So roughly 1500A @ 14.4v but that's just ridiculous.

Realistic musical current draw is between 25 and 50% of total, so you're looking at 375-750A sustained.

If you want to bang on it for hours on end, try for 500+A of alternator and 400+ Amp Hours of battery.

2x 250A alts and 5 D3100's would keep it going all day every day, IMO.

Yea, it sounds like this guys knows his electrical stuffs...

I'd go with what he said.

[kirill007]

Im not sure where you got 15K from, but the XXX6500D's do 6500watts @ 1 ohm, so 4 @ 1 ohm = 26,000. So, @ 14Volts you're looking at approximately 1850 amps of current draw...

I thought he had 3 amps. don't know where i got it from.

But as you already know they don't do 6.5kw at 14V.

And with box rise it will be close to 15kw-16kw. (with all 4 amps)

Like Boon just said, 2 250amp alt and 5 batts but i suggested 2 300amp alt and 2-3 batts it would be cheaper i think and more then enough power.