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<blockquote data-quote="Str8Up" data-source="post: 687017" data-attributes="member: 557553">I have a stock 125amp alternator.&nbsp; I&#039;m running a Brutus 1500D, and 200wrms amp for mids and highs.&nbsp; I only have minnor dimming at stop lights at night.&nbsp; Daytime, no problem.&nbsp; Though, I don&#039;t turn up my sub amp to car rattling levels for normal listening.&nbsp; Only for occasional, brief, 5 minutes max sessions will I turn it full blast.IMO, if you go ported/vented it&#039;s a lot easier on your electrical system to get to any given volume level than in a sealed setup.&nbsp; Efficiency plays a major role in how much power you NEED.&nbsp; From what I hear, the XXX series is horribly inefficient, so porting would definately help so you wouldn&#039;t NEED to have to pour big wattage into it.&nbsp; But in a truck, with the output capabilities of the XXX series, you probably wouldn&#039;t need it&#039;s full RMS rating to get to a sound pressure level that is more than enough for daily listening.Ported/vented if you want more spl for your wattage...</blockquote>

[QUOTE="Str8Up, post: 687017, member: 557553"] I have a stock 125amp alternator. I'm running a Brutus 1500D, and 200wrms amp for mids and highs. I only have minnor dimming at stop lights at night. Daytime, no problem. Though, I don't turn up my sub amp to car rattling levels for normal listening. Only for occasional, brief, 5 minutes max sessions will I turn it full blast. IMO, if you go ported/vented it's a lot easier on your electrical system to get to any given volume level than in a sealed setup. Efficiency plays a major role in how much power you NEED. From what I hear, the XXX series is horribly inefficient, so porting would definately help so you wouldn't NEED to have to pour big wattage into it. But in a truck, with the output capabilities of the XXX series, you probably wouldn't need it's full RMS rating to get to a sound pressure level that is more than enough for daily listening. Ported/vented if you want more spl for your wattage... [/QUOTE]

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