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<blockquote data-quote="zako" data-source="post: 7569365" data-attributes="member: 629735">A dual 2ohm subwoofer with voice coils wired in series, presents a 4ohm impedance. Now, if you take two subs with each wired for 4ohm load, and wire them together to the same channel in parallel, the final impedance will be 2ohms. The good amplifiers in theory should put out twice as much power with 2ohm load, compared to 4ohms, and twice as much with 1ohm load compared to 2ohms. Having said that, a lot of amplifier are not even rated for 1ohm load, and those that are rated do not necessarily run stable, at least some of the cheap ones. With two subs I personally would aim for final 2ohm load, unless I have an amplifier that&#039;s only stable at 4ohms (when two channels are bridged, they&#039;re usually rated for 4ohm impedance or higher only).Crutchfield had some diagrams:<a href="http://www.crutchfield.com/S-S6TzbXmcajK/learn/learningcenter/car/subwoofers_wiring.html" target="_blank">Subwoofer Wiring Diagrams</a></blockquote>

[QUOTE="zako, post: 7569365, member: 629735"] A dual 2ohm subwoofer with voice coils wired in series, presents a 4ohm impedance. Now, if you take two subs with each wired for 4ohm load, and wire them together to the same channel in parallel, the final impedance will be 2ohms. The good amplifiers in theory should put out twice as much power with 2ohm load, compared to 4ohms, and twice as much with 1ohm load compared to 2ohms. Having said that, a lot of amplifier are not even rated for 1ohm load, and those that are rated do not necessarily run stable, at least some of the cheap ones. With two subs I personally would aim for final 2ohm load, unless I have an amplifier that's only stable at 4ohms (when two channels are bridged, they're usually rated for 4ohm impedance or higher only). Crutchfield had some diagrams: [URL="http://www.crutchfield.com/S-S6TzbXmcajK/learn/learningcenter/car/subwoofers_wiring.html"]Subwoofer Wiring Diagrams[/URL] [/QUOTE]

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