Which amp is more powerful, 2ohm stable or 4ohm?

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So whats better keenwood or alpine? im inbetween geting an alpine cda-9884 and a keenwood kdc x 891?

For better sound quality always use a 4 ohm load vs. 2 ohm. The reason is because the amp will run hotter, sound worse and have a shorter life running at 2 ohms. You get more power at 2 ohms but with the problems listed above.

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If you want a certain power rating, get an amp that pushes the watts RMS desired at 4 ohm.

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To get a 4 ohm load with two sub, get two 4 ohm DVCs and wire them like so http://i81.photobucket.com/albums/j230/s...

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Amps aren't only either 4 or 2Ohm stable. A mono amp can be 4, 2, 1, and 1/2Ohm stable. Most are only 2Ohm (minimal) stable.
Ohms is resistance. 2Ohms is half the resistance of 4Ohms, etc...
An amp that puts out 500watts RMS @4Ohms will put out about 1000watts RMS @2Ohm (half the resistance, twice the power).
What makes amps perform at different Ohms (impedances) is the speakers. A 4Ohm speaker will load the afformentioned amp @4Ohms (which will put out 500watts RMS). A 2Ohm speaker will load the same amp @2Ohms (which will put out 1000watts RMS).

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Most 2 and 4 channel amps can go down to 2Ohms per channel.

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Good Luck!

Shopping amps?

From the question u asked 2ohm is more powerful,but also depends on brand af amplifier u are using and wattage.

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sparky is correct
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