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<blockquote data-quote="cappleton3" data-source="post: 620862" data-attributes="member: 557540"><p>I just installed a new system in my truck and I am getting some pretty significant headlight dimming. I have a Kenwood 621 amp driving four 6 x 8's and a Kenwood 811D driving a single Brahma 12". The 621 says it is pulling 6 amps and the 811 says it is pulling 30 amps at full tilt.</p><p></p><p>Should I be seeing headlight dimming with a draw of 36 amps? I just ordered a red top Optima battery as the factory battery is now 4 years old. Does all of this add up? Will I need to do the Big 3 upgrade? I thought for sure the 811 was pulling more than 30 amps giving the headlight dimming I have but according to the amp, it is not.</p></blockquote><p></p>
[QUOTE="cappleton3, post: 620862, member: 557540"] I just installed a new system in my truck and I am getting some pretty significant headlight dimming. I have a Kenwood 621 amp driving four 6 x 8's and a Kenwood 811D driving a single Brahma 12". The 621 says it is pulling 6 amps and the 811 says it is pulling 30 amps at full tilt. Should I be seeing headlight dimming with a draw of 36 amps? I just ordered a red top Optima battery as the factory battery is now 4 years old. Does all of this add up? Will I need to do the Big 3 upgrade? I thought for sure the 811 was pulling more than 30 amps giving the headlight dimming I have but according to the amp, it is not. [/QUOTE]
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