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ok man your right, im wrong, experience has taught me nothing. Theory is everything, practical application is nothing. Im not going to argue about it.

edited

i was running 4975 watts clamped power a year ago from an atomic AT5000.1D with NO fusing on the 5 runs of 0/1 power wire. Subs wired to .25 ohm nominal, .8 ohm after rise.

if you would like to go look at my build thread, youll see that i clamped my power. My starting impedance is 1 ohm. Yet when you calculate the impedance clamped you will find its ~3 ohm. Can you explain this? Its called impedance rise. You will also note that its ~5200 watts.

I've been following this thread for awhile now, and I think there's one main disagreement here.
You can run a huge amount of wattage off of just a battery and caps, but only for very short periods (ie spl competitions) but if you intend on running it for a half hour or so while you are driving you are going to need a larger alternator to keep your power up.

Or ultimately more batteries.

fairly true, although it is still dependent on how long you are running it for.

how many of you have actually done an install of this size before?

I haven't run that large, I am fairly impressed. The last big stereo I worked with was fused at a total of 150 amps and ran off 2 batteries and 2 caps. It was running 4 10's in a bandpass box in the bed of an s-10 ported through into the cab. After burning out the oem alternator it was replaced with a 200amp one.

The system being built isnt for competition burps, I just want something LOUD for my commute to work everyday. So, looks like the downsizing of what I had planned originally isnt a bad idea, since a 300 or greater amp alternator is out of the question under these hoods