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<blockquote data-quote="n2audio" data-source="post: 297574" data-attributes="member: 540940">what do you mean by lacking power?Dimming lights does not constitute lacking power - it means you have a high demand audio system.If your car begins to turn over slowly when you try to start it - THEN your electrical system isn&#039;t cutting it.With a 105 amp alt and a good battery a 1500 rms system shouldn&#039;t be a struggle at all.With a 160A - I think 3kw would be a reasonable expectation.Here&#039;s a pretty good read on current demands of car audio:The Quote:--------its very possible that your alt ernator will do just fine powering that 3000 watt system as long as there are not a lot of other loads on the [electrical system] ------------here is how it works out------a 3000 watt system driven to FULL power with music will have a peak to average ratio of at least 10 db unless it is driven into gross distortion all the time-------this means the long term power output will not exceed 300 watts-------factor in an efficiency of 50% and that leaves you at 600 watts of continuous electrical consumption-------and thats if you don&#039;t have pauses between song tracks or between different CD&#039;s--------and also considering that you NEVER turn the volume down at all------the system you describe will use a little more than half your 70 amp alternators capacity as long as the engine is running............RCThe link:<a href="http://www.carsound.com/cgi-bin/ubbcgi/ultimatebb.cgi?ubb=get_topic;f=1;t=020650" target="_blank">http://www.carsound.com/cgi-bin/ubbcgi/ultimatebb.cgi?ubb=get_topic;f=1;t=020650</a></blockquote>

[QUOTE="n2audio, post: 297574, member: 540940"] what do you mean by lacking power? Dimming lights does not constitute lacking power - it means you have a high demand audio system. If your car begins to turn over slowly when you try to start it - THEN your electrical system isn't cutting it. With a 105 amp alt and a good battery a 1500 rms system shouldn't be a struggle at all. With a 160A - I think 3kw would be a reasonable expectation. Here's a pretty good read on current demands of car audio: The Quote: --------its very possible that your alt ernator will do just fine powering that 3000 watt system as long as there are not a lot of other loads on the [electrical system] ------------here is how it works out------a 3000 watt system driven to FULL power with music will have a peak to average ratio of at least 10 db unless it is driven into gross distortion all the time-------this means the long term power output will not exceed 300 watts-------factor in an efficiency of 50% and that leaves you at 600 watts of continuous electrical consumption-------and thats if you don't have pauses between song tracks or between different CD's--------and also considering that you NEVER turn the volume down at all------the system you describe will use a little more than half your 70 amp alternators capacity as long as the engine is running............RC The link: [URL="http://www.carsound.com/cgi-bin/ubbcgi/ultimatebb.cgi?ubb=get_topic;f=1;t=020650"]http://www.carsound.com/cgi-bin/ubbcgi/ultimatebb.cgi?ubb=get_topic;f=1;t=020650[/URL] [/QUOTE]

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