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<blockquote data-quote="audioholic" data-source="post: 679772" data-attributes="member: 549629">Ohms is a measure of resistance. A 4ohm speaker has twice as much resistance as a 2ohm speaker. Amplifiers put out power accrding to the impedance load (in ohms) they see from the speakers hooked to them. For example, an amp that puts out 100 watts to a 4ohm speaker, would in theory put out 200 watts to a 2ohm speaker.Imagine the amplifier as &#039;pushing&#039; with a certain force. If you cut the resistance on this pushing force by half (from 4ohms to 2ohms), the amount of work done (in watts) will double.There is a catch however, you cannot simply keep decreasing your ohm load (smaller and smaller ohm speakers) forever. An amplifier is only stable down to a certain impedance/ohm load. This is complicated by the many wiring options you have with multiple subs and/or multiple voice coils, as they can be wired together ina&nbsp; combination of series and parallel to adjust the final impedance load and number of channels the amplifier will see.So basically which impedance ID subs to chose depends on your amplifier. I dont remember if you listed the amp already, and Im too lazy to go back and look. //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif But it should be rated for a minimum possible ohm load. Figure that out and match your subs to reach that impedance load. This will gain you maximum power from your amp.</blockquote>

[QUOTE="audioholic, post: 679772, member: 549629"] Ohms is a measure of resistance. A 4ohm speaker has twice as much resistance as a 2ohm speaker. Amplifiers put out power accrding to the impedance load (in ohms) they see from the speakers hooked to them. For example, an amp that puts out 100 watts to a 4ohm speaker, would in theory put out 200 watts to a 2ohm speaker. Imagine the amplifier as 'pushing' with a certain force. If you cut the resistance on this pushing force by half (from 4ohms to 2ohms), the amount of work done (in watts) will double. There is a catch however, you cannot simply keep decreasing your ohm load (smaller and smaller ohm speakers) forever. An amplifier is only stable down to a certain impedance/ohm load. This is complicated by the many wiring options you have with multiple subs and/or multiple voice coils, as they can be wired together ina combination of series and parallel to adjust the final impedance load and number of channels the amplifier will see. So basically which impedance ID subs to chose depends on your amplifier. I dont remember if you listed the amp already, and Im too lazy to go back and look. [IMG]//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif[/IMG] But it should be rated for a minimum possible ohm load. Figure that out and match your subs to reach that impedance load. This will gain you maximum power from your amp. [/QUOTE]

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