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<blockquote data-quote="hari-bhari" data-source="post: 7402692" data-attributes="member: 559890">My stock alternator is not doing so well with my system, getting pretty nasty voltage drops with bass hits. Here is my setup:1) MB Quart DSC4125 amp (600w RMS) for speakers2) BA GT-24 2-channel (700w RMS) pushing an D4 IDQ running at 2ohms.3) Optima red top battery4) 4awg wiring from battery to amps5) big 3 upgrade with 4awg wireI get some pretty significant headlight dimming when the bass hits, and my resting voltage on the alternator is only around 13.8, so I think it&#039;s time to replace it. Also, my resting battery voltage drops to around 12.0 when the car is off (hopefully they will give me a free replacement for a new one).Questions:1) So will a 130A alternator plus upgrading to a Optima Yellow top solve my problems, or is 130A not enough? This will be the easiest solution, since the alternator is a direct bolt-in from a Toyota Highlander.2) Do I need to rip everything out and run 0awg to the trunk?3) Will a second smaller battery in the trunk (thinking a DEKA) help? Because I&#039;m concerned that a 130A alternator won&#039;t be able to sufficiently charge two batteries.I guess the alternative is to just get a beefy 200A alternator, but I can&#039;t find one for less than $350, whereas the above proposed solutions will only cost me aroundPlease let me know your thoughts, thanks.</blockquote>

[QUOTE="hari-bhari, post: 7402692, member: 559890"] My stock alternator is not doing so well with my system, getting pretty nasty voltage drops with bass hits. Here is my setup: 1) MB Quart DSC4125 amp (600w RMS) for speakers 2) BA GT-24 2-channel (700w RMS) pushing an D4 IDQ running at 2ohms. 3) Optima red top battery 4) 4awg wiring from battery to amps 5) big 3 upgrade with 4awg wire I get some pretty significant headlight dimming when the bass hits, and my resting voltage on the alternator is only around 13.8, so I think it's time to replace it. Also, my resting battery voltage drops to around 12.0 when the car is off (hopefully they will give me a free replacement for a new one). Questions: 1) So will a 130A alternator plus upgrading to a Optima Yellow top solve my problems, or is 130A not enough? This will be the easiest solution, since the alternator is a direct bolt-in from a Toyota Highlander. 2) Do I need to rip everything out and run 0awg to the trunk? 3) Will a second smaller battery in the trunk (thinking a DEKA) help? Because I'm concerned that a 130A alternator won't be able to sufficiently charge two batteries. I guess the alternative is to just get a beefy 200A alternator, but I can't find one for less than $350, whereas the above proposed solutions will only cost me around Please let me know your thoughts, thanks. [/QUOTE]

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