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<blockquote data-quote="Savant" data-source="post: 126888" data-attributes="member: 546108"><p>Depends on a lot of things, actaully..</p><p></p><p>Looking at 1200 watts (300x2, presuming 600, you said 2 of those?) you draw ~170 amps at 'full' power with an amp that is ~50% efficient. If it's up to 60% you draw ~140 amps at 13.8 volts.. add the other amplifier and you go up to ~240 amps at 50%.. Keep in mind, the 'max' for the amp is kind of pointless since you can't sustain that for long and will sound like crap up there.. I do my calcs on RMS since that's the 'real' power I'd be able to use.. if your 300x2 is 150 each channel and 75 RMS, you get ~45 amp draw (150 watts RMS x 2).. if it's 300 RMS per channel with 4 channels total, it's closer to ~170 amps..</p><p></p><p>This is based off a calcualtor I found ( <a href="http://www.eatel.net/~amptech/elecdisc/systemdesignassistant.swf" target="_blank">http://www.eatel.net/~amptech/elecdisc/systemdesignassistant.swf</a> ) but I don't how close to perfect it is.. seems pretty close to me.</p><p></p><p>The best alt I saw for my truck was 200 amp, and I need ~265 for all 1800 RMS of my bass. .isn't gonna happen for a LONG time... I'm guessing I'll be running only about 300 RMS to match my stock system, if that much.. maybe closer to 200 RMS..</p><p></p><p>not sure how the extra deep cycle battery helps for long periods.. or if you can run multiple aternators or not (I'd immagine you could but you have a lot of custom fab work to do)..</p><p></p><p>It all just depens, more efficient amps draw less current for the same power...</p></blockquote><p></p>
[QUOTE="Savant, post: 126888, member: 546108"] Depends on a lot of things, actaully.. Looking at 1200 watts (300x2, presuming 600, you said 2 of those?) you draw ~170 amps at 'full' power with an amp that is ~50% efficient. If it's up to 60% you draw ~140 amps at 13.8 volts.. add the other amplifier and you go up to ~240 amps at 50%.. Keep in mind, the 'max' for the amp is kind of pointless since you can't sustain that for long and will sound like crap up there.. I do my calcs on RMS since that's the 'real' power I'd be able to use.. if your 300x2 is 150 each channel and 75 RMS, you get ~45 amp draw (150 watts RMS x 2).. if it's 300 RMS per channel with 4 channels total, it's closer to ~170 amps.. This is based off a calcualtor I found ( [URL="http://www.eatel.net/~amptech/elecdisc/systemdesignassistant.swf"]http://www.eatel.net/~amptech/elecdisc/systemdesignassistant.swf[/URL] ) but I don't how close to perfect it is.. seems pretty close to me. The best alt I saw for my truck was 200 amp, and I need ~265 for all 1800 RMS of my bass. .isn't gonna happen for a LONG time... I'm guessing I'll be running only about 300 RMS to match my stock system, if that much.. maybe closer to 200 RMS.. not sure how the extra deep cycle battery helps for long periods.. or if you can run multiple aternators or not (I'd immagine you could but you have a lot of custom fab work to do).. It all just depens, more efficient amps draw less current for the same power... [/QUOTE]
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