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<blockquote data-quote="RSDXzec" data-source="post: 7756351" data-attributes="member: 638347">I&#039;ve been told before that a low impedance system will cause strain on the alternator, I don&#039;t know how true that is. I know on an amp it causes more strain but does it push the alternator if the amp can handle the impedance?My problem is I have 3 12&quot;s with 4ohm voice coils. Right now I&#039;m running a single sub at 300Wrms at 4 ohms off one amp, and 4 4ohm speakers at 180Wrms on another amp. I&#039;ve done the big 3 upgrade with 2AWG wire on a 50A alt.I&#039;d like to wire up the 3 subs which would give me a 1.34ohm impedance and my current amp only goes down to 2. So I plan on buying another amp (Class D) which is 1 ohm stable and until then I&#039;ll be running 2 subs at 2 ohms with 400Wrms on my current amp (Class isn&#039;t stated in specs). When I do get around to it I&#039;ll be running 400Wrms at 1.34ohms.So I&#039;d like to know if at the same power draw, does the impedance of the system alter the strain on the alternator?Cheers.</blockquote>

[QUOTE="RSDXzec, post: 7756351, member: 638347"] I've been told before that a low impedance system will cause strain on the alternator, I don't know how true that is. I know on an amp it causes more strain but does it push the alternator if the amp can handle the impedance? My problem is I have 3 12"s with 4ohm voice coils. Right now I'm running a single sub at 300Wrms at 4 ohms off one amp, and 4 4ohm speakers at 180Wrms on another amp. I've done the big 3 upgrade with 2AWG wire on a 50A alt. I'd like to wire up the 3 subs which would give me a 1.34ohm impedance and my current amp only goes down to 2. So I plan on buying another amp (Class D) which is 1 ohm stable and until then I'll be running 2 subs at 2 ohms with 400Wrms on my current amp (Class isn't stated in specs). When I do get around to it I'll be running 400Wrms at 1.34ohms. So I'd like to know if at the same power draw, does the impedance of the system alter the strain on the alternator? Cheers. [/QUOTE]

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