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Message: <blockquote data-quote="audioholic" data-source="post: 8590551" data-attributes="member: 549629">Ohms is a measure of resistance. Imagine an amplifier has a given driving force. Doubling the resistance on that force (going from 2 ohms to 4 ohms for example) will halve the overall work created. That's ohms, in a nutshell.Not all amplifiers are designed the same. For example, class a/b amplifiers tend to max their output at 2ohms (mono). Whereas class D's tend to have maximum output at a lower resistance. Also factor in that some people will want to run one subwoofer, some a pair, some 3 or 4 etc... Having multiple impedance options gives the buyer more flexibility in matching up speaker combinations and specific amplifiers. This is at the heart of why we see so many multi-voice coil subwoofers on the market these days.</blockquote>

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